Great review ZT. I'm still not sure where precisely the best position for the air hole is. By the nearest screw post, between that and the other one ? I've found what works but, as others have said, the cap is not the tightest of fitting and easily slides away from the best position with use.
Not a great issue though. Importantly I'm getting a decent Vape from my amateurish coil. Also found a nice companion for my Mini Touchwood.