What he said lol
U can improvise and do dual coil setups on the kanger but it sacrifices a little airflow... But in my experience of dual coiling with the subox, the flavor is intense but the vapor production is mere 6/10.. So so... Not great but good. I had a mad scientist moment when i did 3 coils in that thing, eventually i broke the rba deck coz i kept using higher gauges of kanthal and kept recoiling every few days... So yes it is possible to dual coil the thing but it takes patience and alot of research too... But if u ask me, the single coil setup for the subox's subtank is already sufficiently good... If u want a good dual coil setup u might think of some other tanks such as zephyrus but i dont recommend it lol its kinda tricky the wick the ......... I dont remember much tanks with duals but i can suggest to u that why not go single with the kangertech for ur all day carry every you go vape...and have an RDA with u so that u can make nice snugged dual coils with sufficient airflow for your awesome cloud and flavor C4...
For me, i used to do so many crazy setups till now i get used to the fact of practicality of the battery life, maneuverability, compact size, nice smooth vape (not a tight draw like the goblin) and most importantly SHINY. So that being said 0.4-0.5 is a good vape for me...
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Edit* oh and fyi the xcube 2 is a great mod! U wont go wrong there!