grafter: remixing 3D printed machines

This is a remixed hand cranked test tube centrifuge. It works like a charm, but moreover: it has not been modelled by me but by the shared knowledge on Thingiverse. It is a remix of three existing models mixed together using our software system grafter, a remixing tool for 3D printed machines. (developed at the Hasso Plattner Institute by Thijs Roumen, Willi Mueller and Patrick Baudisch)