This is a 1:1 scale model of an OS MAX 20 radio control engine.  Once printed, the crankshaft, connecting rod, and piston move to simulate the actual stroke.  The Glow plug can be tapped for 8MM to screw into the Cylinder Head.  All screws are either M2X4 or M2X8 and can be threaded into the material with a little effort and care on the first couple of turns.  A few parts have been combined for simplicity of printing and to not require tapping (ie Muffler all in one piece and Needle Valve assembly is one piece).  Future revisions will include the prop, spinner assembly, and a mount…