ernest2, If you can source the June 2005 issue of Radio Control Boat Modeler, they have a large article on reversing speed controls, which will serve the scale boat project. Also, the Perfex esc that comes stock on the Twinstorm 800 can handle 12 cells, has reverse, and a battery eliminator circuit. I'm sure any hobby shop that's a Kyosho dealer can order it for you, but I have no Idea how much it costs.

Tony/T3