Thanks for the tips Dave. I saw your sample footage once before... that is incredible. I have surfed mine in ocean waves before and it's not easy at all. The driver in your movie is very talented! Santa Cruz is an ideal place to play with the RC surfer, but do the real surfers get annoyed?
I water cooled the ESC and actually removed a coil from the motor since it just doesn't get hot. It was the ESC that was thermaling, the water cooling solved that. I really like the run time I get with this setup, but a 7 cell battery would be good to have as a "speed battery".
-Alex