Yeah regarding the bubbles syndrome lol, as Jeremy said you have 2 types of vaping either you rely on wicking or on free liquid transport to the closest point of the coil before flooding. Starting with the former to the latter the amount of bubbles increases. So depending on your style you might see or not see bubbles. People who rely strictly on wicking with a lot of wick they have bubbles less but get dry hits more if it is extreme. I was surprised that without bubbles (practically low amount) no dry hits. So wicking must be very efficient. That was my point 
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