All this talk of the sixties makes me feel really old! I grew up in the fifties, with a succession of Keil Kraft models and Jetex motors that burned up the pocket money horribly. I eventually got an E.D. Bee diesel which powered several control line models. We used to make our own fuel to save the pennies. I bet a chemist wouldn't sell ether to a couple of twelve year olds now, or a hardware shop fill a lemonade bottle with paraffin even if they knew what it was for. I don't remember any of us getting hurt, and we certainly had fun.