I am happy to announce that all STL files for 3D-printed parts of rev.2 are published in my Github reposity: https://github.com/surynek/RR1. I have not yet published the source files in CAD, I will send them on request for a specific part (sometimes parts need to be adjusted by a few tenths of a millimeter for a specific 3D printer). The design of the RR1 robot represents lot of work for me, so I don't want to make the sources completely freely available (at least for now).