Wondering how often folks are re-wicking their Erlk's? I get about 2 (3/4 full) tanks before getting a slight aftertaste telling me it's time. KGD w/28ga 5/64 Kanthal microcoil @ 8W. I would suspect there may be some variation with the wick/coil/power used, but am just wondering if the 2 tanks sounds about right?