Float position (slightly lowered and the back half slightly thicker. The bottom fin has not been installed yet, so it looks thinner than in the photo))
Adjust the position of the base of the wing
The tail has been made slightly lower and wider both front and rear, and the rudder in particular has been extended rearward while emphasizing its curvature.
The main wing attachment angle was changed from 2.5 to 2.3 degrees.