Farsmaleg,
Good to hear from you! Having just had my ankle out of plaster I'd reckon if you can drive a manual car with a heavy clutch you'd be ok in a puma but no idea what the kg/lb values would be. I seem to recall it was your left leg so just go and change a few gears. If it was your right leg the biggest difficulty will be getting in and out of the cockpit.
I always found your meccano leg quite fascinating but I'm a bit odd like that!!
I'll pm in the new year to catch up properly. Good luck.