So here's what I've got: a 1996 VMC2216. I was getting a bad finish on some 6061 aluminum parts. I was getting Vertical lines in the finish. But they were way out of the ordinary. I'm taking .01" as a finish pass. I switched tooling from a 1/2" 3 flute 60degree helix carbide endmill to a 1/2" 2 flute aluminum cutting to a 3/8" 3 flute 60degree helix carbide endmill, with no change. I know it's the X Axis thrust bearing and possibly the ball screw. If I mount a block and put a indicator on it, I can move the table almost .002" BY HAND!!(chair) Does anyone know how to replace the thrust bearing? How big of a pain is it going to be?