I don’t know what you are seeing, but I am seeing a diameter change at the .00x000 position.
In measuring the inner edge of the chamfer, I am seeing from: 1.93657 to 1.93798.
My absolute and relative tolerances are both set at an overkill setting of: .0000001. My angular tolerances are .001 Degree.
At these tolerance settings, a user should be able to make a telescope mirror, not worrying about press-fit bearings. Neither of those examples are exaggerations.
I need to chamfer an inside hole with a woodruff key slot in it, so it would seem that making an exception may not work for that.
I consider this a serious issue because we need that we can count on Rhino’s stated accuracy.