More pictures. I really flew the thing. It took a long run to get off. I finally figured out that deltas need a pretty high angle of attack on takeoff and landing and when I rotated, I dragged the rear of the floats, slowing my speed. Finally, the power yanked it off-see first picture. I have since raised the nose a few degrees more compared to the top of the floats.

I am open to any other suggestions.