Has anyone tried Focal Tune?
As I understand Focal Tune, you shoot a target multiple times (refocusing each time) and then make large AFMA adjustments (5 steps). FT analyzes your shots, discards outliers, and plots curve to show sharpness vs AFMA. Repeat the process, with smaller steps and narrower range, to get setting.
I have not tried it, software was $29 recently. Manual procedure, not sure how zooms are handled