They are a blast. I built a 45" inch sailboat, which I got a real kick out of. Currently, I am hooked on R/C Helicopters. Working my way up to a full control, I have Cyclic and tail rotor, just not collective. That's a couple of hundred bucks away!

Nice boat looks like fun. Hope you have a prop guard. They are easy to fabricate, and will save the rudder, most of the time.