GREY WOLF and OLD FART, I concur if the goal is go-fast. To that end my SPARTAN has TWO water inlet ports and an internal pump to keep my battery, motor and ESC from getting toasted when I am roostertailing it down at the pond. Water return is handled through an RC Plane through bulkhead fuel...
COOL ! Hope my post is relavant and timely. Your woodworking skills are much better than mine ! I just use power tools to quickly turn lumber into piles of sawdust:-) Did you consider wood boat kits before jumping to a complete scratch build ? DUMAS makes some good wood kits...