What kind of time are you all getting? I have been using the smoktech pre drilled 2.5ohm dual coil cartos in my tanks for a while now, but I'm only getting 4 or 5 days out of them before they start tasting funny, not burnt, just different and they tend to start flooding a little bit at the same time. Do the smoktechs just not work very well, or is this pretty typical? Is there a superior carto for VV vaping with a tank? They sell the smoktechs at the local brick and mortar store pretty cheap, but I wouldn't mind paying more for something that didn't have to be replaced as often.