Air Powered Shelby Cobra My little fun project is finished. I just love the design of this car so I got the blueprints and tried to build it as close as possible/useful. I used some small nails for the axes and had to enlarge the holes in wheels and body afterwards. For me the car runs nice but if you think it is to slow just widen the air outlet a bit. Just blow through the 'outlet' to fill the balloon again so you can leave the balloon always at the car. No need for printing supports. Overall printing time on an Up! mini at 0.2mm and so called big hole filling in PLA about 3.5h Let's race ;o)