Great Tool - Imperfect Help
For this serious hobbyist, scratch building large scale model cars, the promise of 3D printing is enormous. So the choice was to join the CAD community or be stuck in the past. I looked at numerous CAD programs, but settled on Rhino because of its ability to model complex curved surfaces.
Rhino has turned out to be a great choice, despite the cost. After a couple of weeks of experimenting I was confident enough of the basics to begin modeling.
I found the Rhino tutorials to be useful, but limited. They are primarily tool based, rather than app based, so figuring out how to model a complex shape generally goes beyond the level of the tutorials. Likewise, I found very little Rhino help for dealing with the challenges of 3D printing. This is a non-trivial issue which I fortunately stumbled over early on. The online advice I found elsewhere saved me a lot of re-design work. A specific Rhino tutorial to deal with this issue would have been really helpful.