I tell you guys what my ARF Sea Master fly's great with my OS 61 SF ABC and the Graupner gray 11x8 three blade prop. The big prop really pulls hard on takeoffs and on vertical lines. Whats really cool is when I deploy the flaperons and idle back for landing the plane just floats in and just settles in for a nice landing. But if you come in too hot it will bounce I did not install the plastic keel on my plane as I find it fun to make high speed turns on the water while taxying I must have over 75 flights on mine now and thats allot for a float plane. It fly's great I would recommend it to anyone. One other thing I did since mine is a float plane only was to cut the covering off the bottom of the wing and epoxy the wing floats on permantly.
Joe