On this, my first and only so far, Mini RBA build... I used the factory coil (measures 0.6Ω on the iStick) and KGD wick. The cotton is genuine KGD, not the cotton that came with the unit, as if that makes any difference. Contrary to what I've read about the KFL, I stuffed as much cotton in as possible, then fluffed it and cut it just long enough to touch the deck when dry (and I figure once wet, it droops a little)... and cut at a ~45 degree angle so that all the ends touch the deck equally when bent over. Put the 'combustion chamber sleeve" part on, wet the wick/coil and moved the cotton away from the weep holes with a hatpin. Put the chimney top on, then put a touch of eliquid on the outside of each weep hole, to sort of 'prime' it. Put it together, filled it up, and it's been working like a champ for over a week now... somewhere between 20 and 30 refills, at least.
Oh, and I put 20ml of 50/50 10mg./ml. premix in a 30ml. bottle, then fill it the rest of the way with straight VG. By my calcs, that makes it 33.33pg/66.67vg @ 6.67mg./ml. And this thing has so much horsepower, that still irritates my throat by the end of the day... I'll be adjusting nic down/VG up some more, soon. (So, in only 3-4 weeks, I've effectively doubled the longevity of my nic stash
)
Also, I'm not a watt-chaser... don't like high watts at all, don't see any rhyme or reason for it. First thing in the morning I want a gentle vape, so I turn the power down to ~8w and the air down to the two-holes position... then slowly increase power and air, until about my third cup of coffee the air is wide open and watts=13 or so... and there it stays all day.
I figure the factory coil in it now and the spare that came with it will last me at least a couple of months, but when it's time to make one, I'll be making it exactly like the factory ones.
Factory coil specs:
28ga (0.013", 0.33mm)
5 wraps
ID= 3/32" (2.38mm, 0.0938")
I'm thinking the Kanger R&D department has the resources to engineer all the specs just right, so who am I to mess around with a good thing?
Hope everyone has a great weekend... I have to fix my tractor today, so might not be around much. But will see y'all in the a.m.
I'm outta here... byyyyyye now.