Upgraded Compressed air engine

Made This because I was tired of stripping out screws and having to reprint the engine anytime it failed. every screw is M2. No Glue required between the Crank Case and the Cylinder. This design allows you to get a better seal on the Cylinder head because you can clamp it down lots better. Make sure you run a M2 screw between all the screw holes before you assemble. THANKS