Well Saturday, on my stock 05 gpr I could only get a top speed of 58.7 gps. The water was about 1-1.5' of chop. Even when I got less than a foot of chop, the thing wouldn't stay in the water for anything, porposing like crazy.

Other than stepping the stock sponsons, is there anything else I can do to help that?

I had just about a full tank, and it was about 80-85 outside temp. Water about 73.