Wow these are great but pointless too. quick and cheap to make, they came out a bit tight so had to shave some cardboard off the tubes to get them to fit then a dab of superglue. I made 9 and 7 went perfectly but 2 went a bit haywire thankfully no damage or injury. Used up some C6 motors i had lying around as i had got too lazy to make another rocket. They go extremely fast which is very impressive but very hard to see. I didn't follow any of them in flight myself. A couple we did in the dark and it was easier to see where it was than in the day in typical British cloudy weather. Thanks for the design.