Wow. Just downloaded MoI3D and it is beyond excellent. And thanks to those on this thread for the DXF converter.

I also use SheetCAM and seem to be always looking for a usable CAD package to draw simple 2D parts for machining and 3D for a bit of concept modelling. I'm not a full time mech designer so can't deal with the neverending learning curves of various 3D packages (Solidworks, Alibre) or slow "Autocad style" of nearly every 2D package out there, which always seem to cost too much for casual use.