ORIGINAL: Mustang Fever
The CG MUST be aft of the steps. If it's not, you'll have no end of problems on takeoff. I have a Superstar with Great Planes 40 size ARF floats, and a Tower 46, and I have been through exactly what you are experiencing now. Move the floats forward until the CG is aft of the steps by about 1/4". Until you do, takeoffs will be exciting.
Interesting. My step is about 3" aft of the CG, almost even with the trailing edge. No problems getting up on step or with tracking. ???