Any other ideas?? I leveled the legs by making 4 spacer blocks exactly the same length that would sit between the lower rails and the table surface at each corner. Same result with the longest measurement being off by a 1/16th of an inch (supposed to be 16.50″ measures 16-7/16″) Is it worth trying to change the steps per mm? By my calculations the new steps per mm would be (200*(16.5/16.4375))=200.7605. Maybe just round it to 200.76. This is really stumped me because the Y-Axis is coming out perfectly.