I have tried the procedure in the documentation, but I have some questions about how this procedure is supposed to work and there seems to be a couple of mistakes in it. I cut a set of squares to measure. This is all about setting the $100 and $101 values. The way I see it, you would only get the spot on dimensions only if the cut is about this same length as the length you pick to calibrate to.

So If I get a 5" square to be right on, as the square get smaller, they get smaller than desired. Example: A 5.000 inch square measures within a .001 or 2 of perfect. By the time the square is 1 inch, it is ~0.020 smaller than expected (or .980). Well, that what I get for the X-axis on my SO3.

Does anyone have any comment on my test results, am I expecting accuracy not deliverable?