Dhadley. I'm still looking at doing those mods real soon. Here is some info on my prop differences. As I told you my Power Tech 14.25"x23p only turns 4700-4800 rpm's. I put my SST 14.25x21p on and I can turn it 5700-5800. The SST really blows out at the slightest turn and not any faster speeds. I hope I can get the PT to spin where I want or I may send it back for the same size as the SST (21p). Then I may be right around 5400 with greater speed. What do you think?