I think the writing was on the wall when PCP pistols and rifles started to win the medals. Not a perception but stark reality.
I was a bit apprehensive the first time that I opened up a Giss action on a Mod 65 Diana, and I think that having been through most Giss systems in rifle and pistol format, the assembly of the pistons is less involving than the related levers and safety mechanism.
Actually I find that timing the two pistons to perfection is what gives me a great satisfaction when I take one apart and I really like the Giss system.
Great video, well done and thanks for sharing.