Just received this and am impressed so far. I don't have a square to really compare to, to be honest, but it passes the pen test, with the corners closed, even when I press a 12" Mitutoyo ruler against the legs to add length drawn lines. If you put a foot on the granite control panel and shine a flashlight behind it, the light is not visible at all. The legs also extend evenly from end to end, with no noticeable narrowing. Expensive but you get what you pay for.
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