I am printing this on an M3D micro printer. It's going very well and looks great. I have a suggestion for printing the pins. They didn't turn out very well when printed straight in the Z axis, so I tried turning them 45` (around the Z axis) on the bed. Simply rotate them before starting the print. They work and look much more like they should. The problem was when printed straight, the lock shoulders didn't print well. Turned 45, they print very nicely!