I'm having a problem with my router. I have ran test parts and this is what they come out looking like. The square is 4"x4" outer and 2"x2" inner. The inner corners are not the same. Corner to corner measurements are 5.582 & 5.617, the left side dimensions on the x axis looking @ the picture is 3.988 on the left, the right side is 3.986. Its running 100 IPM. I'm running Mach 3 and Sheetcam. I would appreciate any feedback. Its a stepper system, the x and y axis are spring loaded. Thanks