Hi, was thinking about your show last night, and the memories of building model rockets as a kid. 

There was a hobby shop near my home, and at one point it had a row of model rockets, motors, starter kits etc. One of the most exciting times was building a two stage rocket that used either C or D motors. I remember the  thrill of watching the two stages go off and then chasing it across fields as the wind caught the parachute on its return to earth. 

Thanks for a great episode.