I bought a new hatsan carbon fiber bottle and had a few questions. First in the manual it say tighten the valve into the bottle to no more then55ft lbs. The valve has nowhere to put a wrench so I assume hand tighten. 2nd to fill the bottle it has a male end to attach a foster fitting. With that do I have to open any valves to let air in or does it have a check valve that let's in air on its it's own.
