When I first brought the boat I knew nothing about them I put it in the water in my backyard I live on a river and thats when the problems started water coming in the hull and a few cracks in fibreglass from fliping and crashing the boat and within a week I lost the whole strut,flex shaft,prop, I didnt use lock tight or lock nuts I got replacement parts did some research and made the boat flawless with no problems I reinforced the hull in certain spots where it was needing more fibreglass I then sealed the inside with paint and clear coat then painted the outside upgraded the prop to a metal 37mm 3 blade and upgraded the watercooling I made a new fibreglass hatch as I lost that when I flipped the boat again lol its a good boat if ur willing to put in the time to do what is required I gps speed tested it and got a top speed of 61km/h on 4s lipos the worst thing about the boat is the hull its not reinforced or thick enough so recommend fibreglassing the inside for strength it does have a tendancy to flip at top speeds aswell (Motor: Joysway) (ESC: Joysway) (5/10)