I thought that one option for this type of bottle was no gauge and simply allowing the pressure to equalise between the two vessels.HTML Code:Of course there is a pressure gauge
Sorry, I was only trying to get a rough idea of the price difference..........HTML Code:Best contact him yourself
The one I use has a quickfill system, gauge and a device to slow feed into the pistol/rifle. This means I can fill to the correct pressure to suit the sweet spot. HTH.