Huma external regulator

You can't fill the tank past the regulated setting. I'm pretty sure you are warned against it by the manufacturer(huma), but I tried anyway. Save yourself the potential problems and trust me. Another thing to note is shipping. It's not so easy to track, and they want you to sign for the package when it gets there via usps. I love my externally adjustable regulator coupled with my long fill hose from airhog. As well as my tester and all my regs. Great to be able to test the internal regs before they are installed. Makes going back to an old tune easy. Happy shooting.