some up close pics to better understand the filler less...
down the barrel...
you can see the metal insert that provides leakage stopping power.
a different angle so you can see the breather tube a little better...
and here you can see the slits that help the insert be placed and where the wick and coil is placed as well as what looks to be a silicone insert to keep the juice from creeping up the tube...
looks like there's just a thin channel around the wick area that allows the juice to feed at about hole height to the wick.
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i get a little gurgling after it sitting vertical for a while and moreso after it sitting horizontal. normally after a couple puffs it goes away.
i'm using pretty much VG juice and priming took quite a few primer puffs. liquid went in immediately and once i thought i may be flooded apparently the wick wasn't completely soaked and i got a few burnt hits. i was stuck at 3.3 volts for a while. i presume this wouldn't be the case with higher pg or if i'd waited a little longer for the VG to soak in a little longer.
i also got inconsistent hits at first. some would be tight draw, some would be loose. when the draw was tight i would have to turn the power down or things would burn. when the draw was loose, the hit was plentiful in the vapor department. now that it's broken in, the draw is nice and loose and my power is turned up.
these things definitely don't need the power of cartos with filler.
mine are low resistance DCTs.
i also have the single coil nitros with filler. they seem to be working fantastically with 50/50 juice and producing tons and tons of flavor with more than favorable vapor. not sure which is producing better vapor, but i'd give the flavor edge to the nitros with filler.
now that the DCT is broken in and consistent, i'd give both types a very obvious edge up in the performance department over boge and smok cartos. though, the DCT seems to have a muted flavor... BUT!!! that may be because my taste buds are rejecting my ADV that i've lowered the flavoring on to use in my RDA... double whammy on the flavor monsters, so it might not be the cartos at all... the jury's still out.
until i have a chance to try the DCTs with a higher pg mix that's not my ADV and the regulars with a high VG juice, the jury's still out as to which one's better. although, i've been very forthcoming and critical here, i'd still highly recommend either... with the edge going to the regular single coil units until i can confirm the flavor perception i'm getting.
DISCLAIMER: obviously none of us have long term usage of any of these so pending how long they last, all could still change... (redundant) obviously...