I'm currently playing with a Big Dripper, authentic if it makes aq difference for this problem, and the copper positive pin looks almost completely flush with the surrounding 510 threading. Haven't had a problem so far but I'm a little concerned it may short if used with another mod. I can't see and obvious way to adjust the pin so Im wondering if this is normal for this atomizer, or if something can be done to ease my mind a bit. thanks!