No. I've had it dribble out a little from the air hole on occasion. Several reasons for this, all related to either over-wicking, and/or improper assembly, and/or any of a dozen reasons that can cause a break in the pressure seal. I have assembled the Taifun and not noticed that the chamber was "too low" to thread into the air tube. This'll cause a pretty quick mess, with instant flooding and leaking out the air hole. I didn't know that juice could get out the 510 connection. That's surprising. Thank you el Cruz for that explanation. I have not banged my base apart.....yet....and hopefully won't have to, to see what's going on down there. Clearly, there's room on the 510 screw to place an O-ring, and likely stop that leaking out the 510. Of course, if the chamber were not flooding, it wouldn't happen either.
For those that aren't up to speed on the fluid dynamics of our little tanks (Bernoulli's Principle), I recommend both blogs from State O'Flux, as follows:
http://www.e-cigarette-forum.com/fo...rs-new-vapists-how-they-work.html#comment9688, and
http://www.e-cigarette-forum.com/fo...-kayfun-air-vent-leaking-thread-response.html.
Any time there is a break in the pressure seal at the chamber/air hole, then gravity and positive pressure can work together quickly to empty the tank all over you. The only thing that keeps the tanks from leaking in the first place is negative pressure, anyway. Break the pressure seal, with too much or too little air flow, too much heat, wrong viscosity, outside pressure or temperature, too little juice in the tank, etc., then leaky, leaky. Generally, a quick mop up with a pipe cleaner, and a couple of quick draws with a finger covering the air hole (to create negative pressure), will create a restoral of the pressure seal. Filling the tank and re-assembly will also generally re-create the pressure seal, provided the flooding is attended to. This could mean a new wick, a swabbing with QTip or pipe cleaner, or all the above. Good luck and Vape Strong!