I built a Just Superstol at the factory and like many, bought the Catto (82"/38) prop recommended by Troy. It's . . . . ok, climbs great, but is in compound low the rest of the time. So I ordered a Prince prop which I'm looking forward to. And in April I'm doing the unthinkable, i.e., taking a new 912S with only 85 hours on it and doing the Zipper Big Bore conversion.