If you use parametric definition of part within an assembly, the order of building changes. You start now with the "big picture"and go down to parts. What I would like to discover is how to make an assembly of assemblies, all this assemblies being in fact configurations of the same assembly. An easy example is to build a wall of paintings in frames. The frames are made out of the same type profile, each frame is a configuration of an assembly of four profiles parametrically defined within the assembly. Problem occurs when you want to place all this frames together on the wall. Because of the parametric definition of the parts, you will not have different configurations of this parts. You can reprezent each configuration of the frame apart, but not all of them together. Does anyone have a solution for this?