What I want in a dive shop.

[arcFlash]

If Iceland can let the general public pump Liquid Hydrogen into their cars then we can make a self serve filling station.

RFID tags for O2 clean, Vip and Hydro on the tanks. Keycard access to station. Air or premix nitrox would removes pure 02 from the system so that only leaves the analyzing. The best part is you pay for the cubic foot.

I don't know trimix but I would think that's possible as well.