You know Max, I can't tell you how many times I've caught that little plastic nut out of place after wondering why it's still running lean! I have it taken care of now... So I think I have this baby licked! After hearing it pop and stutter with a #45 pilot and seeing it run GREAT with a #50 (but while being able to bottom out the mix screw with no idle change), I settled on a #48. And my needle clip is on the 3rd place setting FWIW. It runs smooth on the #48, but if I bottom out the mixture, it doesn't die. It runs REALLY rough and sounds like it could eventually die, but it continues to run. I got the screw out to 1 1/2 turns to have a smooth idle, but I still wanted to check and inquire as to if where I'm at sounds about right. Since it took almost exactly 3 turns out to get the idle smooth (still backfired though) on the #45, I figured the #48 HAD to be the trick. How'd I do? You win a Blue and White Cigar.