What boat do you want to put it in? OTW builds the cylinders to fit in certain kits. For example, I can't stick the two shaft cylinder for my Oberon into my Upholder, where the Upholder tube could work in a Trafalgar. Nor would a Type XXIII cylinder work in a larger hull.
Just something to think about, could save you some frustration later on.
"If you ignore the problem long enough, it will go away. Even flooding stops eventually!"