Here's some pictures from tonight. I bumped the air up to 6 tonight, so I'm at 4 teeth and 6 air. I was at 4 and 5 air over the past few days, but with both those settings, I had no ash ring, so I sent up to 6 to see if that would help with the unburnt coal. I plan on letting it run like this for tonight and checking out the ash in the morning and making more adjustments if necessary. 6 air defintely brought the ash ring back, but there is still unburnt coal in the front. You can really see it in the pictures, especially in the ash bucket photo. Take a look and let me know what you think.
As it's stoking:
Right after it stops stoking:
About 10minutes after stopping: (You can really see the difference between the front and back here)
Ash bucket: (bottom of the picture is what comes off the front of the burner)