Quote Originally Posted by toolarts View Post

the TNT is unnecessary if you have a microscope.

The TPT is so subjective as to be almost useless to a newbie--and again, arguably, the microscope makes it unnecessary.
What would you look for in the microscope image to determine if the bevel is already sharp enough? I don't quite understand since the microscope would only give you a two dimensional image. Do you look at the edge at an angle?