I found a new tidbit just a bit ago that might be a handy thing.
In an assy, it's quite common to have some parts in there, and then desire to have another instance of something that's already in there. No problem, just hold the Ctrl key, and drag and drop into the graphics area. It will then add the new copy of the part at the bottom of the FT and you do whatever you want with it. Nothing new there.
What I just found was that you can Ctrl drag and drop in the FT, as in grab the part that you want to copy that might be half way up the tree, and you want the new instance of the part to be right under the existing one, then just drop it there. The new instance will then be in the proper place in the tree and then you go to the graphics area and move/mate, etc.
So the question then is whether it be better to place in the graphics area and move in the FT, or place in the FT and move in the graphics area. Only you can decide, but at least now you know you have an option.
Ok, Muggs/Ed, here's your chance. :-)
WT