Hi, I have a big top-level assembly with some multibody parts in it. I can use Split to save the individual bodies to file, and then create an assembly. My question is, how do I replace the original multibody part file in my original top-level  assembly, with the new subassembly and individual parts?

I tried using Replace to get the new assembly in place of the old multibody part, however that required me to specifically select each mated face on the new part. Additionally, all of the top-level assembly features (Holes mostly), were then broken.

Is there some way to do this?