What coil do you have in it? Seems to do slightly better with plain round - might just be me. I think I have a 3mm ID but it’s been a long time, I’d have to check. I do recall not wicking very fully though. I’ll say this, it’s never leaked.For the moment, I took off the af ring. It’s way too tight for me otherwise. Trying to decide what to do about it... drill or PIF?