I just got a SGP with my Dual Boiler. I found I had to set the Upper Burr from 6 to 5, and use a main setting of 3 to get a 1:2 ratio in 30 seconds with my preferred beans.

I'm wondering if I should move the Upper Burr even finer to get the settings closer to the middle, or what the equivalent main setting to each Upper Burr adjustment is.

I've seen some charts for the Barista grinders, but not for the SGP.

Has anyone charted the relationship between the two adjustments?

Is there any advantage to using the Upper Burr adjustment rather than just the main setting?

Thanks!

I didn't chart anything or really even do any experimenting with my SGP when I had one paired with the BDB. I just set the internal adjustment as fine as it would go had no problems with it.