I had done some "maintenance" late last year, and apparently put it back together wrong. I noticed that the carves were deeper on the near side (keyboard side) than on the far side. I finally measured the distance from the bottom of the rail that the Y truck runs along to the belt at the two sides, and the keyboard side was 1/8" closer. Hmmm...Now I wish I could really remember just what I had done last year. Probably some maintenance of the X drive belts. I hope so. But I thought that before I start taking it apart again and trying find what I'd done wrong, does anyone have any advice about what to pay attention to? Thanks for any help.

-mw