Decided im done cloud chasing so 2 mm is to airy now. I went to the smallest hole on my trident rda and thats much better for the mouth to lung inhale I do with my protanks. I know the coil needs air and heard it can be dangerous if you dont have the hole large enough for certain builds. The taste is fine and the mod and battery are not heating up, so im guessing it fine? just want to check.