Regarding the cylinders, I am not going to speak to whether I think it is a good thing or bad thing. One of the main reasons I am purchasing new (or **** neared new) is I expect to either wear the rest of the tractor out or trade up to a bigger one before I would have to worry about rebuilding the engine. But, in my opinion, the JD uses wet sleeve because they expect it to be rebuilt. (Just kidding, I don't want to bash any brand here) Actually, every motor has it's advantages and I really like the motor Case uses.