There was a previous big post on this a couple months ago. Sorry I don't have the time to search for it now,, at work. But try searching for it. I even added a link to a video, of a scratch built, I think he called it a companche (Comanche + apache). Nice job & it shoots rockets. I believe he's based in Saudi Arabia. Also on RR there's a video of a guy that has tons of fireworks shooting off his heli. Anyway, as long as its safely done, with no one around for miles, including the AMA, go for it. Hell the rotor blades on a heli are dangerous. A bottle rocket can't chop off a finger or a hand. I'm not saying they aren't dangerous, but they are fun when handled correctly, just like a heli