Follow-Up: As an update to my previous post about the government threatening to regulate all model rocketry, apparently this regulation will only affect engines of 62.5 grams or larger, well above the size of A to D engines, the most popular for hobbyists. This “will make it more difficult to obtain and use the motors needed to make the more high-powered rockets fly,” but at least most casual hobbyists won’t be affected. The largest engine I ever used was a D engine, and that was to propel a six-foot (!) rocket, so I guess I can’t bitch about this too much now that it has been clarified.