Algodoo

You need to change two things:
-add more density to everything in the engine, as more density = more tough collisions and nothing will pop off
-get the killers lower, because if you delete the ball right after it spawns then you won't transmit any power to the piston. The ball should delete whan the piston is close to the lowest part of it's cycle

If you want I can modify this and reupload with credit if you didn't get what I meant. you tell me

Also you need to make the gearbox MUCH HEAVIER (density 100 or so)