please explain with a bit of detail if ya don't mind.
bought one about a week ago been using it quite a-bit without any problems, it's true that it really needs 34mm Cartos but the 35mm Boges work fine.....also the added 510 atty adapter makes it nice for using small RDA's, been using a Mini Smok @ 2.3 at about 4-1/2 to 5 volts and it tastes great with a good hit.
i'm using AW 16340 protected 750mAh and getting about 2 hard hours of Vape-Time, got 6 batts....so far no complaints and everything is in working order.......one thing i been doing different is i'm filling the Carto tank from the top when i use it like you would with a reg Carto Tank the rubber grommet on the fill-hole is flimsy imo and there is no Volt-Meter.....the Tank looks like it won't hold up forever, maybe i can find a couple of replacements, if not i can always use an RDA ....this is the option i like if it were Carto only i would not have bought it.
this is the dripper i'm using now and it does sit flush