I think this is a basic question but I searched and couldn’t quite find the answer I’m looking for. I have a sub assembly that consists of 2 timing pulleyss on either end of a shaft. I have added configurations to the shaft for 3 different lengths. The sub assembly that contains this shaft pulley part also has the driving servo, belts etc. I need to be able to insert the servo/shaft pulley assembly into the master assembly and select which shaft length I want for that particular instance. If I change configurations all the sub-assemblies change not just the one I want to change. Can I do this from the top level assembly? How do I do this?