Estes E9's arent going to give you much of a kick. Get at least an Aerotech F21. Use an onboard ignition system. The "Radio fire" system would be perfect. And if you think 6 bucks is bad, ive spent 50 on a single motor. It got almost a mile high. Oh, and the whole govt thing, it'll happen either way. THe ATF asked hobby stores to provide them with a list of hobbyists who purcahse either rocket or RC equipment. THe stores know better than to give this info out. Its only a matter of time till teh ATF attacks RC like theyve done rockettry. Band together and dont take this lying down.