Well, not that in that day at Scubapro Italy I did receive much more than 2 hours of training...When I later learned that those tech classes and certifications were obtained over the course of a couple of hours, over doughnuts and Nescafé, at a local Sheraton, that was all I could take . . .
But at least I was in the factory where the regulators were really assembled, and after the explanation I had to assemble and tune 4 or 5 myself.
Then the technician dismounted one of them for checking that everything was fine, asked me to dismount and remount another, then I was asked to service my own MKV+109, replacing all the parts contained in the service kit, and that was all...
As I did perform well, the technician made me a gift, the special tool for opening the MK5 first stage.
I was very sad when I did loose it, years later...