Comet disasters program Channel 4

The other difference between the tank failure and the airborne failures is that the latter happened at 500mph so any fuselage skin thrust outwards by the cabin pressure at failure would be ‘snatched’ by the slipstream increasing the break-up forces.
Calling the ADF apertures ‘ADF windows’ in the program was fair enough as it was a term used in the reports.
Anybody know what skin gauges they used on the redesigned Comet 4?