Help guys this is not rocket surgery! It will almost start but not quite. It should be simple. One side at TDC steam valve let’s steam into the top of that chamber drives the piston down . The other side BDC the steam valve let’s steam into the bottom of that chamber and drives the piston up. I even made 2 polycarbonate top covers so I can see the valve action. When I put air in the system the 2 cylinders seem to be fighting each other. Any help would be appreciated. BTW before I painted it I had it running like a charm. And each side runs well on its own.