Earlier quoted context omitted.
Although I've had an engineer fuss at me for using McMaster's bolt models in a rather complicated assembly. They actually model the threads and all the little details of the head, which make for a much larger model. *People who don't work in CAD may not get it, but threaded interfaces are basically modeled with cylinders that overlap where the threads are engaged. It's funny what gets represented accurately and what…
One thing they offer which is really uncommon is parametric models instead of geometric models only. It's like getting the source code instead of only a binary file. So, you can easily suppress unwanted detail.
For weird things? Full parametric models would be great!