a while back I decided to splurge on some new gear and got a yep clone and a zna 50. the setup has been really hit or miss. The zna gets really hot, the resistance is way off, the voltage is off. eventually I decided to try it on my istick 30w and wow did that make a difference. the problem is definitely in the mod. long story short in a moment of inebriated, sleep deprived impulse I bought a god mod on fasttech. Am I going to regret this decision? I've gotten two regulated mods from them that have both been duds, the zna and an istick 20w.