Hi! my manual say's to use lots of aileron throw, needed especially at low speeds! so I set it up that way. My bird has an 8 foot wingspan, and the roll characteristics are very slow. unless you use rudder and aileron at the same time. then it does nice snap rolls. Mind you not as fast as my bipe. but still a snap roll.

Adding floats, did slow the roll down a bit, but not overly slow. do you have water rudders installed. just wondering if mebbe something got mixed wrong. aileron/rudder offset instead of mix or something like that. another possibility, is some water spray from takoff momentarily killed the servo's. have they been waterproofed? I use vaseline on mine to seal the seams. and around where the gear sticks out the housing. My servo's get wet from a big splash, but it doesn't seem to bother em.

Smoky.