Triple Expansion Marine Steam engine update 4

If this is your first time seeing this thing I suggest that you look at all the previous updates for this on going project. If you are interested in being notified on updates and changes please click the follow button. If you are already following this project I thank you.Pistons, Rods and rings are on the list tonight. Some of these parts will have to be printed in triplicate. The rings are an option unless your building it to run on air.