When it comes to arcs, I can't help but think that the writers of such programs could do it the easy way. You have point A and point B, the ends of the arc, then point C being the apex of the arc. Connecting the three points would make the arc. It seems that software writers want to make things complicated. When in reality, it just seems that CAD programs could be done to be more user friendly.. at least that is the way I see it.
I know that in time, I will have to learn some program that is a lil stronger over D2nc, but for now at least, it is sinking in, for the things that I am wanting to do, it would be better to just go one facet of the projected part at a time. Seperate the operations and then do them in a series and not chained together.
This is something that I to wrap my head around last night.. it just took me a while to let the simple sink in.