Picked up one of these Huma regs from Utah AG's...Love it! Shooting tethered is a pleasure - no more constant filling...just set it and shoot for hours.
I don't shoot tethered , but my Prophet with the 700cc tank shoots all day, Not sure it will be up to the 500 shots of my Uragan 177 , But I know its fun to shoot and shoot and not worry about air, Mike