Well just followed the Part Design Tutorial at first to get my head around FreeCAD's way of doing things, doesn't mention about the Std Part Containers. I am so used to using V5, so after reading about the the Part Container does seem to make sense and more like V5..
As to using groups seemed the most intuitive thing to do to group things, it would be useful in V5 ironically as tends to create many Body's and no way to group.., Surfaces have sets but Body's don't have anything. We tend to use V5R21 as i work in China for a large OEM, most suppliers here use UG, and all software outside of true OEM status is 'Copy'.. as to why V5R21 not later versions down to how easy it is for the locals to crack it....
Didn't know the USB002 clone body lost it's link, i see that it is a part rather than a Body under the group, just had a look, seems to work ok here..., i did have a few problems when playing around with cloning and groups, as orginally created two USB's by copying the body and sketch and translating the required amount, then found clone and played around with it, a bit quirky. in the end this is where i ended up.... I hsve Done what you said and it works, but not intuitive from a noob point of view...... i did wonder what the red bits on the icon was....
thanks for your feedback btw
Really liking FreeCAD, seems the closest to the real world for Engineering Design