Ive been running a bb and bbb both with the Q2 .4 coil. Its "rated" to 80 watts, but have you ever used one at 80? It starts getting real warm at 60, 80 is hot! Personally, I like a much cooler vape. 45 was perfect as far as vapor production, but flavor wasnt great at all. I backed it down to 33 where I found flavor best for ME. Could be part of the juice im using, need to go through some V3 and WJLC I have on hand. But that has nothing to do with heat, and at 80 it may come alive, but it wont for me, because quite frankly if I have to vape hot ill quit and keep smoking. We're all different in our needs, what works for you may not be right for me.