Originally a Kyosho mini Z racing boats, no longer available batteries 6v Nicads, so refitted with a new battery tray a 3g Lipos and a lot of trimming to get balance correct, modes are fitted with adjustable skegs on the outdrive for different weather conditions. All in all a good conversion, you can still get the bodies for the 2 different types of boat, and fir ex small aircraft radio and motor, escm and minr rudder servo etc from a wrecked plane, should give great performance with out the reverse.