quit smoking, been vaping with a vv for a bit, im looking into mechs. I have ohms law down, i understand battery voltage, im going to purchase a multi meter, quality battery charger, probably a kick 2 to be safe. my question is, im not cloud vapping, just vapping to keep from not smoking cigs, so when it comes to coils, do you have to "build one" or do you just buy one?