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You have an incorrect expectation: the "Nozzle Calibration" screen is not a setting. It's merely how you input the numbers from printing the nozzle calibration script. It will always start showing 7 & 7. It takes the numbers you input and then computes the actual X and Y toolhead offsets and sets those values as the toolhead offsets (which you can see from RepG 40r22 - Sailfish using Machine > Onboard Parameters).