Thanks HP, if its a smoothy like the .52 it will be a winner. I just checked the Saito .56 stats, the OS .56 has a smaller bore and longer stroke at .945 bore and .811 stroke, the Saito .56 has a .970 bore and .74 stroke. When you run it, I'll try to do a head to head, same prop and fuel, I have two .56 Saito, one with considerable time on it and one barrely broken in. It's inevitable that they will be compared, it might as well be us that does it first.