I just got my first EVOD with 2.5ohm atty head and I was using it with my 400mAh 3.7v mini ego. Popping noise is driving me nuts and the vape volume is sporadic. should've bought the PRO? order new atty heads? on a separate, or similar, note: I feel like I might need to tweek a bit, maybe a 1.8 or 2.2 ohm head; I would like a shorter draw with more smoke and less warmth (like my 510 with tank). Feel free to point out any ignorance or just advise.