I'm sure we all know that some of the PAF Chipmunks came with a .303 Browning and a reflector gunsight. Did students fire at a banner towed by another Chippie? Or was it strictly air-to-ground firing? Despite the jibe about implants (something I know nothing about!), it would be quite interesting to fly the Lycoming version. I currently tow in a PA-25-235 Pawnee from Kirton Lindsey, and its Lycoming certainly 'does the business'. On a good day the Pawnee can tow a glider up to 2,000ft and be back on the ground in about 8 minutes. So, if anyone needs an occasional Supermunk pilot, you know where to find me.