Hole centering aid

[mklotz]

You could just use the edge finder to get x and y center of the hole within part of a thousandth.

I've heard of using an edge finder to center a cylinder. Since, in general, you start off diameter, an iterative process is required. The Osborne maneuver, which I described here...

Osborne maneuver

is typical. However, I've never heard of using an edge finder inside a hole and would want a proof of the technique.

Can you describe the method you would use in more detail, please ?