Klaus,
Can you explain your comment on not rounding the boards and rudders. My blade boards are cut straight at the bottom with the same cord from top to bottom. I think the falcon's boards taper a little from the trailing edge at the bottom. The infusion's boards round from the trailing edge down to a straight leading edge and the wildcat tapers from both the leading edge and the training edge. I am just trying to get an idea of what each design is trying to achieve hydrodynamic-ally. Thanks.