This whole thing is getting more complicated than it should be. It sounds like you've got the floats set up correctly and your engine thrust is at least in the ball park. If you get a good snow fall of soft snow, go out and give her a try. The floats will work fine on soft snow. Don't try them on hard crusty snow, it'll just tear them up. Pay close attention to how easily the plane wants to lift off. It should act like it just wants to lift on it's own. Let us know how it goes.