As per the title, I'd like to screw my Mancraft reg directly to a HPA bottle.   The issue is that the regulator doesn't engage the pin in the bottle. On the Mancraft site they mention putting a screw in the bottom of the regulator to do this, but I don't remember ever seeing an extra screw in the packaging.   Current my setup looks like this which is not ideal, far too much airline.   Is it as simple as a small m4 screw in the center hole, and if so what