hi there, i own a 2004 seadoo 3D and so does my Dad. I'm 350lbs and ride that ski of mine pretty hard. My dad's machine is the same year and same everything except for battery placement is different by 6 inches or so. Other than that they seem identical. The kicker is his will dipp to the right in the water by itself, with me on it, with him on it. And when you drive it at idle, half and full throttle. I know there is some stuff out there on it but nothin exact. What's the deal? Any info would be appreciated. Thanks