I have a new to me Grizzly G9959 "Wood Mill"- circa 2001. I bought it from a meticulous Luthier (guitar repairer) who kept it like new and has put about 20 hours on it total- just never used it- kept it oiled and clean. Most of his use was in wood and some aluminum fixtures- really a cream puff. I brought an indicator with me when I looked at it and didn't take any notes (of course) but didn't find any problems with backlash presale. In order to get this beauty into my walkout basement shop, I took it apart, too much probably, to minimize weight and lower the center of gravity for moving. My logic was that I could give everything a good cleaning and lube when I put it back together. After I got it back together I noted this .035+ backlash on the Y axis. I adjusted the nuts but there is no play at the lead screw/nut level. I have been playing with shims in front of and behind the Y axis thrust bearing- its possible one got lost or installed in the wrong place?. The setup is very similar to a Bridgeport. Handle held on by acorn nuts onto keyed Y axis shaft, zeroing dial, thrust ball bearing mounted in flange that mounts to table with big socket head screws. Have tried shims on either side of thrust bearing- always the same. I can push on the table and move something like .030". I must have dicked it up on reassembly- I would have noticed a quarter turn of backlash. Any help appreciated- everything I see about backlash is about adjusting nuts.