I went out and bought the kangertech sub tank mini running it on my cloupor mini i didnt like how expensive it was but all in all im very satisfied whether u use the prebuilt or rda coil its f ing awesome i have been rockin it for a few days now blowin through juice like mad but i figure its bc of my ratio on pg/ vg which im about to switch up to 70vg 30 pg n see how that goes my local shop sell 60 pg 40 vg so idk how i can get more life outta it but i bout some vegetable glycerin and im cuttin all my 18 mg juice from my old evod down to 5.something it said i would like 3 but tryed that really killed my flavour but really i love this tank it CHUCKS some vapor