I have an associate that is putting together some assemblies that I have some questions about. The assemblies are for marketing purposes only and are not engineering grade. In his assemblies, the base feature is of course fixed. As new parts and subs are added, they are constrained and after he has constrained the parts-subs, he then further constrains the parts-subs by placing them into the fixed constraint like the base feature of the assembly. I find this unnecessary. What is your take on this practice?