Monster, Thanks for the offer but I have the plans, I prefer to build my own. I have all the equip including brushless motors, I am into flying and just wanted to get into the boats some because I have lakes everywhere, I have 3 in the neiborhood here, I know brushless would be very fast, I just wanted to try duct fan but don't know how fast it would be, I thought it would be cool. I do need help learning how to ballance a boat for optimal performance, and I have seen reversing ESC mentioned, I don't understand that, is that so the motor can be reversed while running, if you were to build a hydro would you use verts to steer it or a water rudder. I have so much to learn here