Hey Crab, I too have a NQD jet boat that I have started modding. I took everything out and replaced the jet drive with Graupners mini drive. That let me run a 550 motor that I had on 8.4v. I know that my setup is quite heavy but speed is not my main objective at this point. Any way I'm glad to see a thread just for this boat and will check back from time to time. damfurst