Well, I built myself a second personal PG22 Short. Doing this allowed me to follow my own instructions, and find any remaining flaws in design or instructions. This did result in a minor revision of the location of the set-screw for the guide-rod, along with more explicit notifications on cleaning and sanding parts.
I’m happy to report that my second build not only fired properly on the first shot, but ejected and continued to function throughout 20 consecutive shots, with no visible wear or damage to any parts.
Because this gun is now a spare for me, I decided to have a bit of fun when printing it, and went for a more wild color scheme. I hope others find this as amusing as I do 🙂