Hi John,

Unfortunately, I have a Starrett straight edge and am not afraid to use it, though I am not sure I know what to do with the results. I searched the posts and saw a few questions/answers about table saw flatness. I saw that you replied to them and I was surprised to see your answers. You wrote:

“I tested table saws for Fine Woodworking Magazine for years and I never once found a table saw with a cast iron top that was flat.
They were almost always distinctly concave, dipping unevenly towards the throat plate opening. Typically the saw’s table was out by several hundreths of an inch over a foot, so using your table saw as a reference surface when trying to working to a few thousandths of an inch is only giving you bad information.
Most saw manufacturers try to get their tops flat within .010″, and this is typically about as good as most of them do. By far the most common flaw is that the tables dish toward the blade opening. Unless the dishing is extreme, it generally doesn’t have much affect on the saw’s accuracy.”

I am putting together a new cabinet table saw. I measured diagonally the flatness (not including the wings) and found across one diagonal it measured a .003″ dish which was acceptable to me. Across the other diagonal I measured it to be fairly flat to the right miter slot. Just after the slot it measured .006″ dropping to .014″ low at the far right corner. After seeing your replies I wonder if I am being too critical though .014″ is > .010″. What are your thoughts? Should I contact their customer service?