I am working on a plastic enclosure. Most of the features are designed in a master model. Now an assembly file was saved including split master molding bodies.
I want to add lip/groove in the assembly file. But when the assembly is opened, the lip/groove feature is not allowed to select. It is grey. I tried to work on the assembly which only includes two parts, it is still not working. Only lip or groove can be created in the independent part which was a split body in the master model.
My question: Which way is better to add lip/groove in the master model design?