Hi! Thank you heaps for all your tips. That rhymedI had a fair bit of leaking at first and spitback/gurgling. The inner oring at the top of the chimney right above the fill ports was not sealing, replaced it with one of the included spares and haven't had a drop leak since, and spitback/gurgling has pretty much disappeared as well. I also wicked down into the channels so that the wick is visible for about half holes. Having it tucked just into that ring like some reviewers say didn't work so well for me.
I'm running dual fused clapton, 2x28ga core 32ga outer 5 wraps at 2.5mm, .3 ohms. I can chain vape at 55 watts without a hint of a dry hit, haven't pushed it up higher so see how far it can go because I'm enjoying it at 55w.
My cotton tails were not as long as yours, but I'm actually running the same build as you, except it's spaced claptons. A good buddy of mine has also suggested spaced coils might allow excess juice to drip down into the air flow holes. When I empty this tank, I'll squeeze the coils tight together (is this fused?), change the O-ring and redo the wick. This was my first spaced coils, so I'm still glad I tried it