grbnds, I think it's those damned gremlins that cause that going out of square business. And I agree the holes are a reliable method, I just haven't splurged for the qwasdogs or parf dogs or any of the other dogs yet. Quite honestly, I was using the stops that came with the clamping elements package I did splurge on. The problem was I was getting frustrating results because I threw the whole deal off when I loosened and moved the factory preset wedge stops in the rails before anything else, and none of the videos I'd came across addressed "how" to reset them. The edge of the table just appeared a reliable and repeatable method for me. Since the top is CNC machined, I'd be surprised if the rows and columns of holes were not square and parallel to the edges of the top. I'll check that just our of curiosity and report back. I have found squaring the fence was idiot proof, since even this idiot mastered that task.
Jim