No worries. Thank you so much for the explanation!

I see in the excel sheet the offset for all X, Y, and Z must be equal. What does it do to the calibration?

IMHO, it's all within the realm of realistic manufacturing tolerances... I am not too sure the expected precision and accuracy so thank you for pointing that out. I am not looking for a very tight tolerance but just to make sure my M2 is printing properly. It seems taking multiple measurements and ...

Thank you for providing this tool. I realized how much I need this when I print some ball joints and threaded nuts. I encounter a problem during the calibration when I was measuring the 5mm outside for Y. I measured all possible edges got 4 reading but they do not agree with each other. https://4ksy...