3 hours at the airport - At LCY you can walk in, buy your ticket, check in, go through security, have a beer, and be departing within 45 mins of parking your car. Ditto at GVA.
Just done the figures, and i reckon the mustang would need a tech stop with 3 x 90Kg males. mmmmmmmmm...........and i can save £2000.
If I am rich enough to go to Sion on a Biz Jet (probably going skiing), why would I want to tech stop on the way.....ah yes, that's right, coz I need a pee !