Самый верный вариант проточки тормозного диска на оправке

As you know, truth is born in debates, discussions and, of course, in trials and errors. I tried several options for turning the brake disc and ultimately I consider this one to be the most correct and optimal, especially after I measured the thickness of the base surface with a micrometer. On the front disc, the difference was 0.025-0.03 mm, on the rear disc up to 0.1 mm! I'm just shocked!