"PumaCarl"I have been following your work and really appreciate it. I had a good laugh, you were right, my air stripper was broke also. Everyone seems to be a little hard on themselves in regard to barrel removal and o-ring damage. We, as end users/owners, are a hell of a lot more careful than the people putting these guns together and I would bet that most of the o-rings were actually damaged at assembly. I took my barrel off in a normal fashion (not crazy parnoid careful) and my o-rings were fine. I got lucky with that one. In looking for a replacement air stripper (no 3d printer here) I measured my barrel diameter; made sure my caliper was zeroed, measured again and again and still my Gauntlet barrel is 11.13mm, .438" or 7/16". That is technically a pretty big difference from the 11.36mm that you got, and yes I measured at different spots. My gun's serial number is only 44 higher so I imagine they were made concurrently. Just something else to consider and wonder about. I am use to guns being far more precise. The front handguard tank shroud fit is an abomination also, really Umarex? That was the best you could come up with? I have seen numerous fixes online and they are all lacking and shouldn't even be necessary. I actually like the gun's potential quite a bit I just wish that I didn't have to fix what shouldn't have been broke (or off) in the first place. My gun is also a 19.5fpe gun, which I am fixing and I like doing 'that' stuff although if they had delivered on their early promises of 26 to 27 foot pounds, I wouldn't need too. A true tinker's dream. I have to laugh about the talk of the .25 caliber using 1800psi and getting 46fpe; we'll see. If past performance is truly indicative of future results.... I am really looking forward to your final tank shroud fix, keep up the good work, great video!