My name is awsum140 and I'm a Fogger V4.1 junkie!
I've gotten addicted to this thing after struggling through about a month of poor performance. Now, I'm refilling it more than once a day. I've overcome the crappy coil screw problem, improved the air flow control ring and will be drilling out the horizontal air holes to 2.5mm tomorrow and take some more off the air control ring. I just ordered three more of them, one for my wife, one as a gift and a spare for me. I've succumbed to RTAs, I hope there is mercy for my soul.
awsum - how did you solve the "crappy coil screw problem"?