I have a 40 size trainer that has a set of GP FG floats. I have to run this thing to 40mph on the water to get it to lift off. Could it be the wing is not big enough for the extra weight. Running a 40 FX OS on it and a 10x6 prop. Boy is she fast as a hydofoil ! When I get it to lift off ie: full up elevator....well it almost does a back flip !!!! I have increase the throws on elevator to max and the floats don't have water in them. The floats are 38" long, the rudder hinge line to back of spinner plate is 46 and the step is about 2.5 inches behind leading edge and the floats extend about 6 inches past prop arc. I bought this on RCU, so the plane is a unknown so not sure where the CG should be. I don't have any trouble landing, and it will just fly real slow. The only in flight tendencies it has seems to be squirrly pitch up and pitch down. Any ideas folks ?