Don't laugh, I wasn't joking. The Gummy tank was the 1st large tank and those other ones are just cheap knock offs. The Gummy tank is a top quality item NO rubber taste. and no need to buy pre modded CE2s just simply cut a small slot in the side of the CE2 so it can wick. The wall thickness is double what the El cheapos are using
Of course not every one can just whip one of these out you do need a lathe and have the ability to cut inside O ring grooves.
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Does yours leak at all from the air shaft out of the threaded end?