This question really could apply to other similarly rated PCPS, but before I ask it I need to point out I am new to the sport and to PCPS so it may seem ridiculous but here it goes, Why wouldn't it be desirable or be a practical upgrade to add a higher ps. rated regulator in order to increase the fill up ratings on the rifles with lower than 4500 psi fill pressures. It seems that shot count is a universal concern, esp. with larger calibers and if an air gun was able to hold more pressure this would seem to be the obvious result. I know Huma Air makes aftermarket regulators, and if I understand the way the gun operates the only part of the rifle that would be exposed to these higher fill pressures would be from the regulator back. The Carbon fiber bottles can already handle 4500 psi so why wouldn't it make sense to have the bottle filled to its rated max or at least have the option. Nobody says you have to fill it up that high but it would be nice especially with the .35 cal. I currently shoot. This would be harder on the regulator but other brand rifles seem to overcome this. This question would seem to be even more applicable to the Maverick with its 2 regulators to share the burden.