When the water is as smooth as glass any float set up may have trouble breaking the surface. A pilot of a full sized float plane told me he does a few circles then takes off across his own wake to help break the surface. I have a 60 size Cub on GP floats that I had trouble breaking loose on a dead calm day. Normally no problem. Take Mr. Casey's advice he won't steer you wrong, and happy flying.......Seaplane