I built one-my kit suffered from some very hard balsa which did not help keeping the weight down. It flies well with a Saito .30. I have put the GP .20 sized floats on it and the .30 was a little under powered, but I replaced it with a Saito .40 and it handles the floats just fine. Overall a good build and nice flyer. I have another one and am going to modify the kit for the full length wings for float flying.