About this 3D model

The clevis: http://www.thingiverse.com/thing:5889 needs a mate. This thing, combined with a female clevis, will form a joint. Depending on what you attach the inserted bars to, very interesting degrees of freedom will ensue. This thing has a M3 hole in the position where a matching clevis can be joined. You can use an M3 bolt/nut combo, or make the hole any size you like and use more exotic fasteners. the most ideal situation would be to put tiny little ball bearings in there, and a nice precision pin as a joiner. But, using a simple 3mm piece of ABS filament will also do the trick and if you melt the end a bit, provide you with a quick fastener.