I got my Crystal 16 in the water and the most I could get out of the ETEC 25 wot was about 5100 RPM and 25mph. She gets up on plane just fine but I would like as much speed as I can get. I took the SS prop off today and it is 10 1/4 x 13. What do you think I should replace it with for the best all around performance? 3 blade/4 blade? SS/Aluminum? Cupped/uncupped? Moving to a 11" pitch will increase my RPMs by about 400rpm? I really don't know anything about props. The current prop is beat up a bit and I would like a spare anyway.