This is my final car design I've been testing it out and it does the job. So its the same as the first and the second. So I'm back down to one level because it added to much weight. So like the first one its one level with slots cut out for the wheels and to get rid of the balloon dragging on the wheels in the front I added an arch for the balloon to rest on. So this is my final car, my trials have been going well as well.