Great idea on the water cooled head for the esc. Does this fit the stock blast esc or do you have a different one? I'd be interested to know double wound motor does. Mine is a quad wound and does well. I was thinking about putting a 17t in the boat just for grins. I really don't think the blast was designed to go much faster then what either tweek or I have it set up. With a full battery it chine walks on a straightaway.