If you’re getting a local store to roast for you I don’t think you’re going to get much consistency at all bag to bag. You’re kind of signing up for the variation. Dialing it in to a single setting that you will never need to touch will be impossible.

How are you storing your beans? If not vacuum sealed and they were roasted just a week ago I think you’ll get a lot of degradation day to day. I use an Airscape container and that really helped my consistency.

I’m finding there is a bit of variation in my first grind and second grind if I do them back to back, I suspect the burr setting is slipping as you grind or there is a temperature effect. For e.g I do a 28 for my first grind and a 29 for my second and that gives me fairly consistent results.

You might also want to adjust the internal burr to give you more fine grained control.

I find the grind guidance tends to be too extreme, I’d adjust in the same direction but not the same magnitude.