I can say with all honesty I never back out the regs on my GEN4 and it airs up just fine every single time. I've never had any issues the required me purging the original valve either, nor with the 2nd Delrin Poppet. The one time it blew off the Center Poppet O-ring was due to my boneheaded friend that borrowed it and thought it was a good idea to doubt my word and decided to tear it down and lube it up according to his standards which entails globbing loads and loads of lube on every single O-ring and moving part and upon airing it up countless times it gushed air uncontrollably. He called me up and I knew instantly what he had done. I told him to bring it over to take a look at it knowing full well I'd find a complete tube of Dow33 in it and boy did I. LOLOLOL
Before opening it up I looked at him and said, you know what the problem is here?... YOUR *******!!!!
He said Me??!?!?!? I said yup! I bet you I find tons of lube inside the Marker. With that dumb look idiots get when they realize they've been caught but still try to deny everything, he says not me? I said Oh really?
Sure enough I remove the left side panel from the frame and the first thing I notice is lube in the hoses. Then I remove the front block and when I look at the Rocket Valve Cap, I immediately see globs of lube covering every last mm of surface including the cap itself! LOL It went further but in the end I simply tore it down, scrubbed the entire thing with palmolive and a toothbrush, dried it and then Lubed it Properly. I showed him how to properly lube things, constantly emphasizing the importance of the word "Sparingly" and explained why all that excess lube was counter productive and how few surfaces actual contact one another. I aired it up and voalah!
I tell you, I've never seen a more unintelligent person in my life.