Are you building it to conform to any certain rules? If not, then there are all sorts of cool ideas to play with! There is a guy in the US building carbon fiber karts, might be able to track down some more info if you're interested (didn't immediately come up in a web search...). Some manufacturers were playing around with tubes of different cross-sectional shapes a few years back, but I think rules were drawn up to stop that, it would have quickly turned the market on its ear. I would be willing to help in the form of brainstorming/bouncing ideas around and maybe a little engineering help if you'd like...
Ooooh, just noticed how old this thread is
He probably has the thing done built by now
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