Mike,

I do like Moi for the things that you state. It really is free form enough to function as a sketching tool.
In the past I used turbocad pro to draw up problem plans. I'm attaching a bench I made that I couldn't have done easily without using CAD. Nothing really wrong with turbocad but it's a bit of a chore to use comparatively to Moi. The fact that Micheal holds the line on keeping his program simple to use by not having too many buttons is to be applauded. I have seen a number of pieces of software start out as simple to use and then they knuckle under to user pressure and add endless features.