I think I'd like to see a Terms of Service link. GitHub's does a pretty good job of clearly explaining the situation.
Also, I don't think using or encouraging the use of a CC-Noncommercial license is a good idea, since it would prevent you or anyone else from offering 3d printing as a paid service to those who can't afford their own 3d printer.
Also, I don't think using or encouraging the use of a CC-Noncommercial license is a good idea, since it would prevent you or anyone else from offering 3d printing as a paid service to those who can't afford their own 3d printer.