Tinkercad link: https://tinkercad.com/things/4QmyBzqKqlL-hinged-rhombohedron
Thingiverse link: http://www.thingiverse.com/thing:185859
Settings: Low/.3mm MakerWare settings on a Replicator 2 in one hour and 10 minutes.
Technical notes: These fit together to tile 3-dimensional space, so if you print a lot of them trying to get them to work then you can test that out. Just saying. It was hard to get the last bit of the model to work correctly so I have a lot of these.