Electro-Launch. There's one in my avatar picture, with the Alpha shown lawn-darted in my post above, sitting on it....
Don't need eight D cells when they're Duracells. Four work just fine.
Yup! Too cool! And you're still using it?!?! WOW! I remember that too-small safety interlock key and the little flashlight bulb for a continuity check light! Too bad about the Alpha, it would have been nice to see it make its 100th flight!