My son had a real simple 36 hp dry set-up on his 600 F4-I. He cut out part of his rear fender (above and forward of the tire a little) for the bottle, had a switch to use the horn button, put it on the dyno to make a map for the P.C. that he could switch back and forth for the street with his lap top. The thing would fly but the downside was the during the race, as the pressure and temp changed, so did his ET. It is hard to win races that way.