A full size, 3D printable interface part to allow the joining of the proton pack gearbox at: http://www.thingiverse.com/thing:509510 to the ribbed tube from the Synch Generator: http://www.thingiverse.com/thing:526328 The STL file is intended for use with a tube of outside diameter 27mm, and a M6x50mm bolt. You will need the MCAD OpenSCAD library at: https://github.com/SolidCode/MCAD Epoxy the bolt into the interface, slotting the head into the hex. hole. Edit the scad file for different tube/bolt sizes.