Hey, I love this program so far but I have a question. I usually union all of my parts at the end of the design so as to assure that they're all part of one structure. Is this necessary though or does MOI automatically make it a coherent structure when exporting?

For some reason if I union this design then 2 of the legs disappear(not sure why) but can I just keep them all as separate parts? That also makes it easier to modify the design later.

Thanks