Rookie at on float set up. I have a KF1 with a 582. Purchased it for the float set up. It came on wheels, floats dismantled. Former owner couldn't give(remember) me the set up positions he had used for float mounts. Through measuring, weight and balance calculations, and trial runs, it finally popped off the water in a short run. Now a couple of days later, its a no go. Altitude Density probably part to blame. The engine tach 5500 on take off run. It has been suggested to change pitch. I have a GSC 3 blade prop. It seemed to be close to wanting to step up and go but just not quite get there. Prior owner said he never changed pitch, but he operated at sea level, I am 1000 ft higher. Any suggestions on what pitch angle I maybe want to set the pitch?