nice review... did you say you had the seven 20 too ??? Will the bottom battery cover from the seven 20 fit the seven 30? That is really the only thing I don't like about mine. I am running it with the Kanger Aerotank Giant, and like it very much... I am running the 1.8 ohm coils, and have tested to about 18 watts with no burned taste... When this one burns out, I will try one of the .8 sub-ohm coils on it...