I have been vaping on Ego batts with Evod tanks and might be looking to upgrade to a mech. I'd like to have something very compact and durable that I could carry in my pocket while I work(I'm a roadie). Looking for a small mech and a tank of some sort. I don't need huge liquid capacity. I've been looking at the Halfling from IBT and some smaller mechs like the 4nine. I've also come across the IGOF atomizer. Basically, I need something that doesn't leak, is durable, and small enough to be carried in a pocket while working. Thanks!