Frustrating morning with my KM3 I got recently from a good friend. Started out I wanted to tighten the airflow. Ran the air screw in a little. No change. Ran it in a little more. Still no change. Ran it in all the way, no change. Knew something was wrong b/c all the way in there should be NO airflow. Thought maybe the screw was messed up. Swapped it out with another screw. Same problem. Finally figured the thing wasn't screwed all the way in so I pulled out a larger microdriver and cranked on it. Sure enough, the internal AFC threads were roughed up a bit. I powered through the rough patch and got a bunch more turns out of it. Cinched it down and no airflow. Backed it off a little and found my sweet spot.
Then, I was getting weird hits. Nice solid ones with some weak ones mixed in. Was intermittent. Figured my coil was wigging out. Got tired of it so went to replace the coil and when I put the screwdriver in the mount screw it wiggled. Sure enough, it wasn't making good contact. Cinched it down using the same coil and I'm back in the saddle again.
It's the little things, Folks.