Another idea would be to use a cap nut. If you get one with the correct size wrench flats, it won't rotate off center and the CO2 can still pass by. It they would probably have to be quite small though. The hole in my eBay 12g changer would have to be M2.5 or M3.
Sent from my Pixel 4a using Tapatalk
Sent from my Pixel 4a using Tapatalk
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