Yeah I see it now. I have only used the screw. I get a tiny bit of leakage out of it (I think, it's hard to tell) but not enough to cause a problem, just wipe it up every few days with some kitchen roll. I'll probably try the plug at some point but I'd be a bit afraid it would come loose.
Next time i do a refill Adam i will use the screw and see if there is a difference in how they perform
The plugs do work fine, BUT i am wondering if they are not sealing the pressure 100%, and maybe there lies the problem i had been having. All seems great now though after trying your suggestion.
