Have you tried , let's say that current build in the photo, before saturating, trim down just the tails, reduce the fluff of the tails to half volume and maybe the lenght also. I can't really see how much lenght you are using but maybe it's all just wicking too slow? Again these are just some things that help in an rta and maybe not in a dripper, but it might be worth a try... maybe by reducing some of the excess bulk it may wick better.
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