Boats...
 

I was wondering what ppl do...

I was thinking about trying to find a blast with the optional water cooling kit and then using a 5700/4600 on 2/3s with a sidewinder.

Thoughts... I no nothing about boats!

I would think the blast would be very unstable much above 20 mph. Maybe try one of those aquacraft brushless jobs and put a better system in it?