A .75 won't do anything for this airplane but make it a handfull. A .46 is perfect or at most a .55.

I have the smaller GeeBee floats from Tower on mine, I've used them on many .40 size airplanes with good results. many people don't say good things about them but I have had at least one airplane on them at any time since 1976. I've probably had 6 or 7 pairs and at least 10 different airplanes on them.

The Dazzler is a great plane on them, you can do circles on the beach, run down into the water, take off, do touch and go's on the beach and just abuse the things like you can't with any other wood or fiberglass floats.