Great story Dave! Thanks for sharing.
Seems a complicated method. Why not just displace the air with N2 while the bead is off? An honest(really) tire dealer near me has a meter to measure nitrogen %. He says he's never seen better than a 90% fill. (vs.78% atmosphere) A complete waste of $ and effort on a street car. I have to snicker whenever I see those little green caps on people's valve stems, sort of like having SUCKER stamped on your forehead.
For me OEM Ferrari approved air is the only way to go. Ok, it's a bit of a pain to have the car flat-bedded 260 miles round trip for a puncture but if you want to maintain your records it really is the only way to go. Dealer charges me only £40 per corner plus the towing.