funny you should say that. Hanvt you seen the ones that came on the first Batboats? Ocke use to have a section on his site for the sefl righting system he put under the rear hatch. Worked good and there was even a vid clip or animation as i remember. Odd thing was those boats dont go over very much so it never really took off with the series. I have some pics and screen captures from his old site but there on a harddrive i cant access at the moment. I will see what i can find.