Content Center is a feature that is really great.
If you haven't used it check it out, in an assembly mode, right click and select Content Center.

But, always know there is a but.

Bolts, they need to get the terminlology straightened out.
Those are screws, bolts are screws that come with nuts. There are no nuts on those screws.

(been there, talk to your fastner supplier if you don't believe me).
Also, how can I change the radius "rr" for the shoulder screws?
I have never seen a shoulder screw with that much radius on it before, never.
Almost all the shoulder screws I have specified have a chamfer on them, and they are minor at that. The shoulder screw does not look correct.

Also, shoulder screw specification that I am familar with is specified by the shoulder diameter, not by the screw size.

Great feature, Autodesk really needs to get it's terminology correct.