Anyway, now I know the table is as perfect as hand tools and my milling machine can make it. I figure it’s plus or minus less than half a millimeter over its length of 3.3 meters. The table sits on eight 5/8″ bolts that serve as adjustable feet, and in adjusting the table I found out just how out of level the concrete floor of the operating room is. I figure if I really want to make it perfect, I can flood the pit you see in the photos so the surface of the water is exactly level with the surface of the table, but that might be excessive.