Okay, I frequently see the "airy draw" mentioned as a characteristic of the Protank. Question is, what do people consider "airy"? I've been using a Vivi Nova, Smoktech Pyrex DCT and a bunch of CE4's (on an eGo Twist). The Vivi Nova is obviously a pretty tight draw, the Protank considerably less so, and the CE4 probably the most "airy" of the three. So to give me a comparison I can relate to, how does the Protank compare to a CE4 in terms of "airiness"?