http://www.youtube.com/watch?v=TP0rD0dG5oA Time-Lapse of a RepRap Printing Interlocking Rings by Jonathan Palecek / CC BY. With the exception of CC0, the Creative Commons licenses are only for granting permissions to use non-software works. The worlds of software and engineering have additional concerns outside of the scope of what is addressed by the CC licenses. 3D printing…