For those clear tanks on the Herons I used a razor and cut a 10ml juice bottle down. They actually fit nice and snug but you have to cut the to the right height, if they are too tall the air post won't seal with the deck properly and cause some leaking.
I never used fluff in my Herons, I've always wicked them with Rayon and left a fluffy tail into the juice chamber. It doesn't leak and the rayon wicks it beautifully.
Mine has started dribbling at the 510 connector. Can't figure out what I might've loosened to make it do that.
Not a lot, just enough to make it not fire after awhile.
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