I am wondering if it would be feasible to get a mode where you could select parts by selecting (left drag = select whole parts and right drag = select everything touchinh drag, like in Rhino)
And the other function, would be mirror. I figure you already have duplicate and maybe you could add mirror. Could be good!
We have a new selection mechanism in KeyShot 3. So this might be a possibility. At least we will have multi-select.
Mirror - mirror the geometry in your modeling software ...
or do a real mirror... ;D