Its hard not to go to far in the future trying tell this story as a time line. After adding the new rear float system. I had been taking the plane to a lake, trying hard to get it to fly. That is the time line of Norms flying boat and the discussions with members ,here and the EAA's forums where I post near identical . To shorten up those difficulties . Many suggestions were implied ,and applied. from insufficient elevator size to an improper hull. In fairness I listened . The truth just turned out to be something else insufficient elevator travel. was not discovered until , summer 2017 test flights while trying to get a more reasonable take off. In 2012 I had resolved the problem by adding lift spacers under the leading wing mounts . They increased the angle of attack to something within that then elevator travels limit. I was still not happy with things in 2012 and after . I chased after one thing or anther with worsening results. Much flying time was lost as a result. Though every plane has improvements that can or should be made. The biggest problem was weight gain and water weight gain. The changing weight also added to the lift off problem to the point that it became unable to fly after landing with a hot engine . A wind became needed after that. I need to go back now to explain other changes before covering the plane.