Hi Alan - nice sub ! The pressure bottle behind the Thruster will eat some power of your Thruster .. hmm ähh .. thrust.. May you can replace the bottels (higher) or thruster (deeper) Carsten Ray Keefer schrieb: > > Hi, > > I put a picture of Alan Winick's Explorer on the web site at > http://www.psubs.org/psub_pic/alan_winick.html. > > Regards, > Ray