My red nut is backed off 6 turns. In the cold weather I have one pin at 0 10 20. When the it gets warmer I use one pin at 0 7.5 15 22.5. I'm using buckwheat too.
I have a two story home and a new chimney only for the KA6.
If you are going taking a trip to Easton Pa. I'm only ten minutes into New Jersey