James7, I think there are quite a few here who'd be very interested in hearing whether you still believed it to "no problem at all" after you tried what was suggested (normal cruise levels, unpressurised, crew on oxy) for just one short-ish sector, let alone Melbourne-Toulouse. Even if you managed the oxygen - which would be debatable - I'd just love to see how you handled the cabin temperature.
No problem at all.
