Hi there my x-carriage wheel 1 on each side is seem to not be touching the beam. I got pictures that explain what am saying. Has anyone encounter this before and how did you fixed it. Picture having problem uploading to the site. http://imgur.com/GYmLstR,C1T1Rfy,THK...iWCG,tLjrx2P#0 . I have adjusted the eccentric spacer but it seem not to fix it. Also loosen the x carriage screws and push on it and still seem to not fix it. Also took the x carriage off and back on with the same nut thread on the threaded rod. What you guys think I need to do to fix it. When it moves up or down it does not roll.