"Rolling back" a model assembly

Morning all

 

Is there a way in SW to "roll back" an assembly to the first/primary/base part brought into the model space and then the line can be pulled down in the feature tree part-by-part in order to reinstate/renew/correct the mates/constraints in the assembly? It's just a lot easier imho to rebuild an assembly part-by-part rather than from one big mess of parts altogether. Cheers.