Grimy/Tom,
I think my potential issues will be weight and space. I'm building the tub to be able to hold the cells and motor, they are the two biggest passengers. There's not much differance in speed from on-plane to off-plane on a 6-cell stocker. That's why I'm thinking a switch. A little less weight and a little less drain on the battery. ESCs are pretty efficient these days but every bit I can squeeze out of a cell I'll take.
Mike, I did see your pic.s a while back and the video. Looked awsome!
chunk t