We have been running an animal in 400 lb. class but nobody else runs one ,so we are thinking about going the clone route so we will have someone to race with. Which one is better? Red,yellow,blue? is their any difference? Just read about a harbor freight motor with more cc's. Is it legal? That might be the best thing for us because we could use the potential extra power, we roll across the scales at 450lb. So we are almost always giving up 40-50 pounds to the other racers. Thanks for any advise.