I designed this boat to have some fun with it in the water. I glued all parts together with epoxy resin. I drove it many times in a lake and it was really fun. Unfortunately i picked too small motors (outrunners 4s-950KV-25A) so it only got up to about 10 kmh. I used 3mm stainless stell rods and 4x3,1 mm brass pipes to connect the motors to the Rods. All parts are designed for M3 screws. The motor mount holes are 19mm and 16mm apart from each other, i also used the 3mm steel rod to hold the stearing nozzle in place.