Jerry, I've found that the plane, when on it's take off run, will dictate the float's incedence rather than the floats dictating the plane's incedence. When the floats are at high speed, they will (by design) teeter on the step. If you have the nose of the floats down too much, the plane (if trimmed out correctly) will try to attain level attitude which will push the nose of the floats down. This will result in uncontrollable high speed steering. You can prove this out by adding up elevator on the take off run to push the back end of the floats down and lifting the nose end. The steering will get better, but too much up elevator could result in premature lift off or the back end of the floats dragging and slowing the plane down. I would suggest you start out with 2-3 degrees positive wing incedence when the tops of the floats are level. Don't forget that floats will tend to stick to the water especially on dead calm water. I've seen this happen and the pilot right away thinks the setup is wrong. A little head wind and some ripples will help a great deal......Seaplane