Top Up Bottles what's out there??

[niloticus1]

Of course there is a pressure gauge

I thought that one option for this type of bottle was no gauge and simply allowing the pressure to equalise between the two vessels.

Best contact him yourself

Sorry, I was only trying to get a rough idea of the price difference..........

[civvy]

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.