I picked that method as my original machine had a touch probe and touch plate and using the master tool method just made things easy and consistent. Really it's all about which method you want to learn and put into your noodle. On the new machine I don't have a probe or touch plate but still use the master tool method. I just have a DTI in a tool holder as the master tool and then measure my tools off a height gauge I made similar to the Edge Technologies units.