So by having the new valve and programming in my Alpha, it will have the 1045fps. capability?
I can't answer that, but my question would be what pellet has stability at that velocity? I've never shot MRD's until I got this safari and they seem to like speeds over 900fps for sure. Will a MRD stabilize at 1000+ fps? Are you talking slugs? Everything I've read says the AW in .22 is unfortunately not a slug gun. I've tried 23 grain NSA's, and Javelins. In both .217 and .218 and it was horrible.
Even if my AW is 'capable' of 1045fps, I'm not sure I want to push my voltage and reg up to the numbers that would get you there. There is a advanced setting called "warp" that supposedly maxes out everything, but I'm not going there.
Kind of like my Impacts, yeah, I can push a 40 grain slug over 1000fps, but it feels, sounds, and shoots better tamed down to shoot 31.2 grain at lower reg and hammer settings.
As far as replacing the gauge, I wonder what the length of the threads on huma gauges are compared to the factory gauge. It would have to be a 23mm gauge to fit the AW stock and the o-ring size that Daystate says is behind the gauge is 3.5 x 2.62 N70. I can't find that exact size o-ring anywhere but I did find a 3.63x2.62 N70 that I'm betting would work.
https://www.oringsandmore.com/metric-buna-o-rings-3-63-x-2-62mm-minimum-50-pcs/ I ordered a 23mm huma gauge this morning. I'll let you know if it works.