I have an Avistar on floats. What a great float flyer. OS 46 FX with 11x7. Plenty of power. I think a 40 size would even be enough. I have plastic "Galleggianti" floats on it. Don't know who the US distributor is now. But they are 33 1/2 in. long. If you can find these floats they are very good, I think. But others are good, too. Any way--put 'er on floats, you'll love it. Here's a pic of mine. Good luck-John