Yes Rich,
I saw that in the CV notes. It really helps you to see whats going on.
My first lathe had .007" backlash in both ballscrews. The cheapest Thomson's from MSC.
I set the backlash to .500 and by watching the results of each adjustment, optimizing the settings became much easier.
I like the loop idea, I just programmed a full circle in the X-Z plane with an M47 at the end.
RC