Recently, I purchased a HPA system (which is set up with a pin-valve) for my Mag ('93). Since I will no longer have to worry about freezing, I have decided to try setting up my marker without running a remote, to see how it suits me. I fashioned a drop out of aluminum, and bolted my AGD supplied backbottle to it. Everything was fine until I tried screwing in the bottle, at which point air began spewing out of the adapter. It seems that the stem inside of the adapter is causing the valve to open too early, thus dissallowing a proper seal. I tried with my old CO2 tank (which had been run only through remote), and noticed the same problem. Both tanks work fine through the remote, and adaptors from other manufacturers, and the backbottle works fine with non-pin valves and connectors. Out of curiosity, I tried hooking up both tanks to another 'Mag with an AGD adaptor, and I noticed the same problem. This one is about four or five years old. At this point, I question the design of these adaptors, and suspect that they may not be entirely compatible with these valves.
Is the described problem common with this adaptor? If so, has the design been modified since then in order to rectify this?
If the adaptors currently being produced are the same as these earlier ones, rather than try another, my first plan of attack might be to file down the pin in the adaptor to allow the tank to be screwed in further before the valve opens. However, I don't want to do this if it won't work, or if it will cause the valve to open only partially, thus restricing flow (I don't have a gauge to measure this).
In the case that this would not be feasible for whatever reason, I will buy a new one. If the adaptors from AGD are still the same, then I will simply have to purchase one from another manufacturer. If the described problem is isolated to the two that I have used, then I may pick up an AGD adaptor when I order the LVL 10 kit.
Please let me know what the case is with the adaptors, and if you think filing down the adaptor pin might work.