Thanks for the info Stoker and Gil, I did have fun. When I bought it I didn't even notice that it was a twin cylinder. Today I made a new cylinder and piston. While I was taking it apart I found lots of broken and un soldered pieces of pipe. The big boiler must weigh 5 pounds and is super solid. [ Guests cannot view attachments ] [ Guests cannot view attachments ] [ Guests cannot view attachments ] [ Guests cannot view attachments ]