Just bought a used quest, original frame. I think it's a Gen3 with several upgrades including a GM bolt and 07 pin. I was thinking about getting the new 4B bolt from TAS but it looks like your mods would get most of what that offers. It's really great to see folks working to make the quest better. Thanks!
I don't believe that it is actually marketed as being a 'Critical' Snatch pin - new production (assuming that these aren't just the latest versions of old stock Snatches) just seems to have quietly supplanted the old parts. The new/newer Snatch pins do now have a wider shaft between the two front o-rings, so acts somewhat like a tape mod, releasing less air volume per shot - assuming that the air chamber is completely emptied with each shot.