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          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://kustoment.com/role/ScheduleOfPrepaidExpenseDetails" id="ScheduleOfPrepaidExpenseDetails">
          <link:definition>999059 - Disclosure - SCHEDULE OF PREPAID EXPENSE (Details)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://kustoment.com/role/ScheduleOfIntangibleAssetsDetails" id="ScheduleOfIntangibleAssetsDetails">
          <link:definition>999060 - Disclosure - SCHEDULE OF INTANGIBLE ASSETS (Details)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://kustoment.com/role/ScheduleOfIntangibleAssetsUsefulLifeDetails" id="ScheduleOfIntangibleAssetsUsefulLifeDetails">
          <link:definition>999061 - Disclosure - SCHEDULE OF INTANGIBLE ASSETS USEFUL LIFE (Details)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://kustoment.com/role/ScheduleOfEstimatedAmortizationForIntangibleAssetsDetails" id="ScheduleOfEstimatedAmortizationForIntangibleAssetsDetails">
          <link:definition>999062 - Disclosure - SCHEDULE OF ESTIMATED AMORTIZATION FOR INTANGIBLE ASSETS (Details)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://kustoment.com/role/GoodwillAndOtherIntangibleAssetsDetailsNarrative" id="GoodwillAndOtherIntangibleAssetsDetailsNarrative">
          <link:definition>999063 - Disclosure - GOODWILL AND OTHER INTANGIBLE ASSETS (Details Narrative)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://kustoment.com/role/ScheduleOfOtherAssetsDetails" id="ScheduleOfOtherAssetsDetails">
          <link:definition>999064 - Disclosure - SCHEDULE OF OTHER ASSETS (Details)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://kustoment.com/role/OtherAssetsDetailsNarrative" id="OtherAssetsDetailsNarrative">
          <link:definition>999065 - Disclosure - OTHER ASSETS (Details Narrative)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://kustoment.com/role/ScheduleOfDebtObligationsDetails" id="ScheduleOfDebtObligationsDetails">
          <link:definition>999066 - Disclosure - SCHEDULE OF DEBT OBLIGATIONS (Details)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://kustoment.com/role/ScheduleOfFuturePrincipalPaymentsOnDebtObligationsDetails" id="ScheduleOfFuturePrincipalPaymentsOnDebtObligationsDetails">
          <link:definition>999067 - Disclosure - SCHEDULE OF FUTURE PRINCIPAL PAYMENTS ON DEBT OBLIGATIONS (Details)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://kustoment.com/role/DebtObligationsDetailsNarrative" id="DebtObligationsDetailsNarrative">
          <link:definition>999068 - Disclosure - DEBT OBLIGATIONS (Details Narrative)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://kustoment.com/role/ScheduleOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails" id="ScheduleOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails">
          <link:definition>999069 - Disclosure - SCHEDULE OF FINANCIAL ASSETS AND LIABILITIES MEASURED AT FAIR VALUE ON RECURRING BASIS (Details)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://kustoment.com/role/FairValueMeasurementDetailsNarrative" id="FairValueMeasurementDetailsNarrative">
          <link:definition>999070 - Disclosure - FAIR VALUE MEASUREMENT (Details Narrative)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://kustoment.com/role/ScheduleOfFairValueMeasurementsChangeInLevel3InputsDetails" id="ScheduleOfFairValueMeasurementsChangeInLevel3InputsDetails">
          <link:definition>999071 - Disclosure - SCHEDULE OF FAIR VALUE MEASUREMENTS CHANGE IN LEVEL 3 INPUTS (Details)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://kustoment.com/role/ScheduleOfAccruedExpensesDetails" id="ScheduleOfAccruedExpensesDetails">
          <link:definition>999072 - Disclosure - SCHEDULE OF ACCRUED EXPENSES (Details)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://kustoment.com/role/IncomeTaxesDetailsNarrative" id="IncomeTaxesDetailsNarrative">
          <link:definition>999073 - Disclosure - INCOME TAXES (Details Narrative)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://kustoment.com/role/ScheduleOfFederalNetOperatingLossCarryForwardsDetails" id="ScheduleOfFederalNetOperatingLossCarryForwardsDetails">
          <link:definition>999074 - Disclosure - SCHEDULE OF FEDERAL NET OPERATING LOSS CARRY FORWARDS (Details)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://kustoment.com/role/ScheduleOfOperatingLeasesRightOfUseAssetsAndLiabilitiesDetails" id="ScheduleOfOperatingLeasesRightOfUseAssetsAndLiabilitiesDetails">
          <link:definition>999075 - Disclosure - SCHEDULE OF OPERATING LEASES RIGHT OF USE ASSETS AND LIABILITIES (Details)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://kustoment.com/role/ScheduleOfFutureMinimumLeasePaymentsDetails" id="ScheduleOfFutureMinimumLeasePaymentsDetails">
          <link:definition>999076 - Disclosure - SCHEDULE OF FUTURE MINIMUM LEASE PAYMENTS (Details)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://kustoment.com/role/CommitmentsAndContingenciesDetailsNarrative" id="CommitmentsAndContingenciesDetailsNarrative">
          <link:definition>999077 - Disclosure - COMMITMENTS AND CONTINGENCIES (Details Narrative)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://kustoment.com/role/ScheduleOfStockOptionsOutstandingDetails" id="ScheduleOfStockOptionsOutstandingDetails">
          <link:definition>999078 - Disclosure - SCHEDULE OF STOCK OPTIONS OUTSTANDING (Details)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://kustoment.com/role/ScheduleOfStockBasedCompensationValuationAssumptionsDetails" id="ScheduleOfStockBasedCompensationValuationAssumptionsDetails">
          <link:definition>999079 - Disclosure - SCHEDULE OF STOCK BASED COMPENSATION VALUATION ASSUMPTIONS (Details)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://kustoment.com/role/ScheduleOfSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeDetails" id="ScheduleOfSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeDetails">
          <link:definition>999080 - Disclosure - SCHEDULE OF SHARES AUTHORIZED UNDER STOCK OPTION PLANS BY EXERCISE PRICE RANGE (Details)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://kustoment.com/role/ScheduleOfRestrictedStockActivityDetails" id="ScheduleOfRestrictedStockActivityDetails">
          <link:definition>999081 - Disclosure - SCHEDULE OF RESTRICTED STOCK ACTIVITY (Details)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://kustoment.com/role/ScheduleOfNon-vestedBalanceOfRestrictedStockDetails" id="ScheduleOfNon-vestedBalanceOfRestrictedStockDetails">
          <link:definition>999082 - Disclosure - SCHEDULE OF NON-VESTED BALANCE OF RESTRICTED STOCK (Details)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://kustoment.com/role/Stock-basedCompensationDetailsNarrative" id="Stock-basedCompensationDetailsNarrative">
          <link:definition>999083 - Disclosure - STOCK-BASED COMPENSATION (Details Narrative)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://kustoment.com/role/ScheduleOfWarrantActivityDetails" id="ScheduleOfWarrantActivityDetails">
          <link:definition>999084 - Disclosure - SCHEDULE OF WARRANT ACTIVITY (Details)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://kustoment.com/role/ScheduleOfRangeOfExercisePricesAndWeightedAverageRemainingContractualLifeOfWarrantsDetails" id="ScheduleOfRangeOfExercisePricesAndWeightedAverageRemainingContractualLifeOfWarrantsDetails">
          <link:definition>999085 - Disclosure - SCHEDULE OF RANGE OF EXERCISE PRICES AND WEIGHTED AVERAGE REMAINING CONTRACTUAL LIFE OF WARRANTS (Details)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://kustoment.com/role/CommonStockPurchaseWarrantsDetailsNarrative" id="CommonStockPurchaseWarrantsDetailsNarrative">
          <link:definition>999086 - Disclosure - COMMON STOCK PURCHASE WARRANTS (Details Narrative)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://kustoment.com/role/StockholdersEquityDetailsNarrative" id="StockholdersEquityDetailsNarrative">
          <link:definition>999087 - Disclosure - STOCKHOLDERS&#8217; EQUITY (Details Narrative)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://kustoment.com/role/ScheduleOfNotePayableRelatedPartyDetails" id="ScheduleOfNotePayableRelatedPartyDetails">
          <link:definition>999088 - Disclosure - SCHEDULE OF NOTE PAYABLE RELATED PARTY (Details)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://kustoment.com/role/ScheduleOfMaturityDebtObligationsDetails" id="ScheduleOfMaturityDebtObligationsDetails">
          <link:definition>999089 - Disclosure - SCHEDULE OF MATURITY DEBT OBLIGATIONS (Details)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://kustoment.com/role/RelatedPartyTransactionsDetailsNarrative" id="RelatedPartyTransactionsDetailsNarrative">
          <link:definition>999090 - Disclosure - RELATED PARTY TRANSACTIONS (Details Narrative)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://kustoment.com/role/GainOnExtinguishmentOfLiabilitiesDetailsNarrative" id="GainOnExtinguishmentOfLiabilitiesDetailsNarrative">
          <link:definition>999091 - Disclosure - GAIN ON EXTINGUISHMENT OF LIABILITIES (Details Narrative)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://kustoment.com/role/ScheduleOfWeightedAverageNumberOfSharesOutstandingAndLossPerShareOutstandingDetails" id="ScheduleOfWeightedAverageNumberOfSharesOutstandingAndLossPerShareOutstandingDetails">
          <link:definition>999092 - Disclosure - SCHEDULE OF WEIGHTED AVERAGE NUMBER OF SHARES OUTSTANDING AND LOSS PER SHARE OUTSTANDING (Details)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://kustoment.com/role/ScheduleOfSegmentReportingDetails" id="ScheduleOfSegmentReportingDetails">
          <link:definition>999093 - Disclosure - SCHEDULE OF SEGMENT REPORTING (Details)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://kustoment.com/role/OperatingSegmentsDetailsNarrative" id="OperatingSegmentsDetailsNarrative">
          <link:definition>999094 - Disclosure - OPERATING SEGMENTS (Details Narrative)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://kustoment.com/role/ScheduleOfDeferredRevenueDetails" id="ScheduleOfDeferredRevenueDetails">
          <link:definition>999095 - Disclosure - SCHEDULE OF DEFERRED REVENUE (Details)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://kustoment.com/role/DeferredRevenueDetailsNarrative" id="DeferredRevenueDetailsNarrative">
          <link:definition>999096 - Disclosure - DEFERRED REVENUE (Details Narrative)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://kustoment.com/role/ScheduleOfNoteReceivableDetails" id="ScheduleOfNoteReceivableDetails">
          <link:definition>999097 - Disclosure - SCHEDULE OF NOTE RECEIVABLE (Details)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://kustoment.com/role/ScheduleOfAssetsAndLiabilitiesAsDiscontinuedOperationsDetails" id="ScheduleOfAssetsAndLiabilitiesAsDiscontinuedOperationsDetails">
          <link:definition>999098 - Disclosure - SCHEDULE OF ASSETS AND LIABILITIES AS DISCONTINUED OPERATIONS (Details)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://kustoment.com/role/ScheduleOfIncomeLossFromDiscontinuedOperationsNetOfTaxDetails" id="ScheduleOfIncomeLossFromDiscontinuedOperationsNetOfTaxDetails">
          <link:definition>999099 - Disclosure - SCHEDULE OF INCOME LOSS FROM DISCONTINUED OPERATIONS, NET OF TAX (Details)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://kustoment.com/role/ScheduleOfCashFlowClassifiedAsDiscontinuesOperationsDetails" id="ScheduleOfCashFlowClassifiedAsDiscontinuesOperationsDetails">
          <link:definition>999100 - Disclosure - SCHEDULE OF CASH FLOW CLASSIFIED AS DISCONTINUES OPERATIONS (Details)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://kustoment.com/role/DiscontinuedOperationsDetailsNarrative" id="DiscontinuedOperationsDetailsNarrative">
          <link:definition>999101 - Disclosure - DISCONTINUED OPERATIONS (Details Narrative)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:roleType roleURI="http://kustoment.com/role/SubsequentEventsDetailsNarrative" id="SubsequentEventsDetailsNarrative">
          <link:definition>999102 - Disclosure - SUBSEQUENT EVENTS (Details Narrative)</link:definition>
          <link:usedOn>link:presentationLink</link:usedOn>
          <link:usedOn>link:calculationLink</link:usedOn>
          <link:usedOn>link:definitionLink</link:usedOn>
        </link:roleType>
        <link:linkbaseRef xlink:type="simple" xlink:href="kust-20260630_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:title="Presentation Links" />
        <link:linkbaseRef xlink:type="simple" xlink:href="kust-20260630_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:title="Label Links" />
        <link:linkbaseRef xlink:type="simple" xlink:href="kust-20260630_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:title="Calculation Links" />
        <link:linkbaseRef xlink:type="simple" xlink:href="kust-20260630_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:title="Definition Links" />
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    <import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" />
    <import namespace="http://xbrl.sec.gov/dei/2026" schemaLocation="https://xbrl.sec.gov/dei/2026/dei-2026.xsd" />
    <import namespace="http://fasb.org/us-gaap/2026" schemaLocation="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd" />
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    <element id="KUST_CountryStampedeAcquisitionMember" name="CountryStampedeAcquisitionMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_DebtInstrumentRedemptionPeriodFiveAndThereafterMember" name="DebtInstrumentRedemptionPeriodFiveAndThereafterMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_DebtInstrumentRedemptionfirstSixMonthsOfTwoThousandTwentySevenMember" name="DebtInstrumentRedemptionfirstSixMonthsOfTwoThousandTwentySevenMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_TwoThousandTwentySmallBusinessAdministrationNotesMember" name="TwoThousandTwentySmallBusinessAdministrationNotesMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_ThirdPartyMember" name="ThirdPartyMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_UnsecuredPromissoryNoteMember" name="UnsecuredPromissoryNoteMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_TwoThousandTwentyFiveSeniorSecuredConvertibleNoteAndCommittedEquityFinancingMember" name="TwoThousandTwentyFiveSeniorSecuredConvertibleNoteAndCommittedEquityFinancingMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_SecuritiesPurchaseAgreementMember" name="SecuritiesPurchaseAgreementMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_WarrantDerivativeLiabilitiesMember" name="WarrantDerivativeLiabilitiesMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_ResearchAndDevelopmentMember" name="ResearchAndDevelopmentMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_TaxYear2017AndBeforeMember" name="TaxYear2017AndBeforeMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_TaxYear2018AndAfterMember" name="TaxYear2018AndAfterMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_StockOptionsMember" name="StockOptionsMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_RangeOneMember" name="RangeOneMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
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    <element id="KUST_SeriesAWarrantsMember" name="SeriesAWarrantsMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_SeriesBWarrantsMember" name="SeriesBWarrantsMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
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    <element id="KUST_FebruaryTwoThousandTwentyFiveSeriesBWarrantsMember" name="FebruaryTwoThousandTwentyFiveSeriesBWarrantsMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
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    <element id="KUST_SeptemberAndDecemberTwoThousandTwentyFiveDetachablePurchaseWarrantsMember" name="SeptemberAndDecemberTwoThousandTwentyFiveDetachablePurchaseWarrantsMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
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    <element id="KUST_TwoThousandTwentyFourPurchaseWarrantsMember" name="TwoThousandTwentyFourPurchaseWarrantsMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
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    <element id="KUST_RangeThreeMember" name="RangeThreeMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_RangeFourMember" name="RangeFourMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_RangeFiveMember" name="RangeFiveMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_RangeSixMember" name="RangeSixMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_RangeSevenMember" name="RangeSevenMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
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    <element id="KUST_DigitalAllyHealthcareIncMember" name="DigitalAllyHealthcareIncMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
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    <element id="KUST_LiabilitiesOfVideoSolutionsBusinessHeldForSaleNonCurrent" name="LiabilitiesOfVideoSolutionsBusinessHeldForSaleNonCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
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    <element id="KUST_GainLossOnExtinguishmentOfLiabilities" name="GainLossOnExtinguishmentOfLiabilities" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
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    <element id="KUST_WorkingCapital" name="WorkingCapital" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_NonrefundableExtensionPayment" name="NonrefundableExtensionPayment" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_InterestExpenseUnderpayment" name="InterestExpenseUnderpayment" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_AccountsReceivableAbstract" name="AccountsReceivableAbstract" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_AllowanceForSubscriptionsReceivableNet" name="AllowanceForSubscriptionsReceivableNet" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_NotesReceivableLongTerm" name="NotesReceivableLongTerm" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_AmortizationOfDiscountAndInterestAccrued" name="AmortizationOfDiscountAndInterestAccrued" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_ProvisionalEarnoutAdjustment" name="ProvisionalEarnoutAdjustment" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_CumulativeProvisionalEarnoutReductionToPrincipal" name="CumulativeProvisionalEarnoutReductionToPrincipal" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_LitigationReceivables" name="LitigationReceivables" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_AllowanceForLossOnLitigationReceivables" name="AllowanceForLossOnLitigationReceivables" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_ReserveForExcess" name="ReserveForExcess" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_InventoryNetTable" name="InventoryNetTable" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" />
    <element id="KUST_PrepaidInventory" name="PrepaidInventory" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_PrepaidOfferingCosts" name="PrepaidOfferingCosts" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_IntangibleAssetsIncludingGoodwillGross" name="IntangibleAssetsIncludingGoodwillGross" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_IntangibleAssetsIncludingAccumulated" name="IntangibleAssetsIncludingAccumulated" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_IntangibleAssetsIncludingGoodwillImpairment" name="IntangibleAssetsIncludingGoodwillImpairment" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_LongTermDebtGross" name="LongTermDebtGross" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_FairValueDisclosuresTable" name="FairValueDisclosuresTable" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" />
    <element id="KUST_EarnOutAdjustmentLoss" name="EarnOutAdjustmentLoss" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_ReclassificationToAdditionalPaidinCapitalUponConversionOf2025SecuredNotes" name="ReclassificationToAdditionalPaidinCapitalUponConversionOf2025SecuredNotes" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_AccruedBoardOfDirectorsFees" name="AccruedBoardOfDirectorsFees" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_AccruedLitigationSettlement" name="AccruedLitigationSettlement" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_IncomeTaxDisclosureTable" name="IncomeTaxDisclosureTable" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" />
    <element id="KUST_EffectiveIncomeTaxStatutoryRateAssetsValuationAllowance" name="EffectiveIncomeTaxStatutoryRateAssetsValuationAllowance" nillable="true" xbrli:periodType="duration" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour" name="LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_ConsistingDamages" name="ConsistingDamages" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_PrejudgmentInterest" name="PrejudgmentInterest" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_Costs" name="Costs" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_InsuranceCancelledAmount" name="InsuranceCancelledAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_ScheduleOfStockOptionsAbstract" name="ScheduleOfStockOptionsAbstract" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_ScheduleOfStockOptionsTable" name="ScheduleOfStockOptionsTable" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" />
    <element id="KUST_NumberOfRestrictedShareNonVestInRemainderOfFiscalYear" name="NumberOfRestrictedShareNonVestInRemainderOfFiscalYear" nillable="true" xbrli:periodType="instant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_NumberOfRestrictedShareNonVestInYearTwo" name="NumberOfRestrictedShareNonVestInYearTwo" nillable="true" xbrli:periodType="instant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_NumberOfRestrictedShareNonVestInYearThree" name="NumberOfRestrictedShareNonVestInYearThree" nillable="true" xbrli:periodType="instant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_NumberOfRestrictedShareNonVestInYearFour" name="NumberOfRestrictedShareNonVestInYearFour" nillable="true" xbrli:periodType="instant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_NumberOfRestrictedShareNonVestInYearFive" name="NumberOfRestrictedShareNonVestInYearFive" nillable="true" xbrli:periodType="instant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionsWeightedAverageExercisePriceVested" name="ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionsWeightedAverageExercisePriceVested" nillable="true" xbrli:periodType="instant" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionsIssuedInPeriodWeightedAverageExercisePrice" name="ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionsIssuedInPeriodWeightedAverageExercisePrice" nillable="true" xbrli:periodType="duration" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionsExercisesInPeriodWeightedAverageExercisePrice" name="ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionsExercisesInPeriodWeightedAverageExercisePrice" nillable="true" xbrli:periodType="duration" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionsExpirationsInPeriodWeightedAverageExercisePrice" name="ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionsExpirationsInPeriodWeightedAverageExercisePrice" nillable="true" xbrli:periodType="duration" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingAndExercisableWarrantsExercisePrice" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingAndExercisableWarrantsExercisePrice" nillable="true" xbrli:periodType="duration" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingAndExercisableWarrantsNumberOfWarrants" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingAndExercisableWarrantsNumberOfWarrants" nillable="true" xbrli:periodType="instant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingAndExercisableWarrantsWeightedAverageRemainingContractualLife" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingAndExercisableWarrantsWeightedAverageRemainingContractualLife" nillable="true" xbrli:periodType="duration" type="xbrli:durationItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_DisclosureCommonStockPurchaseWarrantsTable" name="DisclosureCommonStockPurchaseWarrantsTable" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" />
    <element id="KUST_DisclosureCommonStockPurchaseWarrantsLineItem" name="DisclosureCommonStockPurchaseWarrantsLineItem" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_IntrinsicValueOfOutstandingWarrants" name="IntrinsicValueOfOutstandingWarrants" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingAndExercisableWeightedAverageRemainingContractualLife" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingAndExercisableWeightedAverageRemainingContractualLife" nillable="true" xbrli:periodType="duration" type="xbrli:durationItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_DescriptionOfWarrants" name="DescriptionOfWarrants" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_CommittedEquityFinancingFacility" name="CommittedEquityFinancingFacility" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_CommitmentFeePercentage" name="CommitmentFeePercentage" nillable="true" xbrli:periodType="instant" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_CommittedEquityFinancingFacilityAmount" name="CommittedEquityFinancingFacilityAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_AdjustmentsToAdditionalPaidInCapitalTransitionOfWarrantDerivativeLiabilityToEquityUponExerciseOfPrefundedWarrant" name="AdjustmentsToAdditionalPaidInCapitalTransitionOfWarrantDerivativeLiabilityToEquityUponExerciseOfPrefundedWarrant" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_DispositionOfBusiness" name="DispositionOfBusiness" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_MinimumBidPriceRequirementInStockholdersEquity" name="MinimumBidPriceRequirementInStockholdersEquity" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_StockIssuedDuringPeriodSharesIssuedForServicesAcquisitionSettlementOfDebt" name="StockIssuedDuringPeriodSharesIssuedForServicesAcquisitionSettlementOfDebt" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_NotePayableRelatedParties" name="NotePayableRelatedParties" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_DeferredRevenueAdditionsCurrent" name="DeferredRevenueAdditionsCurrent" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_DeferredRevenueRecognizedCurrent" name="DeferredRevenueRecognizedCurrent" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_DeferredRevenueAdditionsNoncurrent" name="DeferredRevenueAdditionsNoncurrent" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_DeferredRevenueRecognizedNonCurrent" name="DeferredRevenueRecognizedNonCurrent" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_DeferredRevenueAddition" name="DeferredRevenueAddition" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_DeferredRevenueRecognized" name="DeferredRevenueRecognized" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_ProvisionalEarnoutReductionToPrincipal" name="ProvisionalEarnoutReductionToPrincipal" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_DisposalGroupIncludingDiscontinuedOperationSubscriptionsReceivablesNetCurrent" name="DisposalGroupIncludingDiscontinuedOperationSubscriptionsReceivablesNetCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_DisposalGroupIncludingDiscontinuedOperationSubscriptionsReceivablesNetNoncurrent" name="DisposalGroupIncludingDiscontinuedOperationSubscriptionsReceivablesNetNoncurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_DisposalGroupIncludingDiscontinuedOperationLeaseRightOfUseAssetsNoncurrent" name="DisposalGroupIncludingDiscontinuedOperationLeaseRightOfUseAssetsNoncurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_DisposalGroupIncludingDiscontinuedOperationResearchAndDevelopmentExpense" name="DisposalGroupIncludingDiscontinuedOperationResearchAndDevelopmentExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_DisposalGroupIncludingDiscontinuedOperationSellingAdvertisingAndPromotionalExpense" name="DisposalGroupIncludingDiscontinuedOperationSellingAdvertisingAndPromotionalExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_DisposalGroupIncludingDiscontinuedOperationIncomeLossFromOperationsBeforeImpairment" name="DisposalGroupIncludingDiscontinuedOperationIncomeLossFromOperationsBeforeImpairment" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_DiscontinuedOperationTaxEffectOfProvisionalEarnoutAdjustment" name="DiscontinuedOperationTaxEffectOfProvisionalEarnoutAdjustment" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_ProceedsFromImprovementAllowance" name="ProceedsFromImprovementAllowance" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_ProceedsFromIssuanceOfCommonStockGross" name="ProceedsFromIssuanceOfCommonStockGross" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_LitigationPolicyTextBlock" name="LitigationPolicyTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_ProvisionForDoubtfulAccountsReceivable" name="ProvisionForDoubtfulAccountsReceivable" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_IncreaseDecreaseInLeaseDeposit" name="IncreaseDecreaseInLeaseDeposit" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_ScheduleOfWarrantModificationTableTextBlock" name="ScheduleOfWarrantModificationTableTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_DeclineDerivativeFairValueOfDerivativeNet" name="DeclineDerivativeFairValueOfDerivativeNet" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_ChangeInFairValueAdjustmentOfWarrants" name="ChangeInFairValueAdjustmentOfWarrants" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_TransactionFeesAndCommitmentFeeOffsetsGross" name="TransactionFeesAndCommitmentFeeOffsetsGross" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_TransactionFeesAndCommitmentFeeOffsetsInCash" name="TransactionFeesAndCommitmentFeeOffsetsInCash" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_TransactionFeesAndCommitmentFeeOffsetsNet" name="TransactionFeesAndCommitmentFeeOffsetsNet" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_VideoSolutionsMember" name="VideoSolutionsMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_CommittedEquityFinancingExercisesGeneratedGrossProceeds" name="CommittedEquityFinancingExercisesGeneratedGrossProceeds" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_ELOCInvestorMember" name="ELOCInvestorMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_CommittedEquityFinancingExercisesGeneratedNetProceeds" name="CommittedEquityFinancingExercisesGeneratedNetProceeds" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="KUST_RecognitionOfPretaxGainOnSale" name="RecognitionOfPretaxGainOnSale" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
</schema>
