ORIGINAL: 1QwkSport2.5r
A little eye candy for sportster fans. This was from two summers ago shortly after I finished the boat build. 12x8 MA prop and SIG Champion fuel. I'm going to have a rematch sometime before summer is over with the sportster 65 on this boat which the boat was originally built for.
http://www.youtube.com/watch?v=pwdsXcMDSMA
How about trying an 11x11 or 11x12 prop on the Sportster .65, if you haven't already? That should provide plenty of high speed thrust and very high speeds.
Also, you could mount a weight within a tube and use a string and an electric motor to adjust the weight's position, fore and aft, to help prevent the hopping your boat is experiencing. Just move the weight when at speed for the least hopping.
Ed Cregger