About this 3D model

A double-revolute joint which serves as a shoulder joint. Consists of three parts; Alpha, Beta and Charlie. The 'Alpha' part is currently designed to slot over a piece of wood 29mm wide and 17mm high. It has a socket depth of approx. 15mm. The 'Charlie' part is currently designed to slot over 20x20 aluminium extrusion. A word of warning: the plastic nuts and bolts are pretty weak, especially if only printing in PLA. Don't over-tighten or the top will snap off the bolt.