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Hi CallumSorry to rain on your day mate but the ODS unit was never designed to run with a spring.The ODS and earleir GDT Units were soley designed to be used with MCUs.Why? Well MCU disepate energy as well as store it. where as springs mearly store. The Shim stack in either of these dampers will a smashed to bits if you run a spring.As Dave at CVI he will comfim what I has just said.