It's hard to tell from the pics. Is there much of a ridge on the underside of the carriage? I would expect that there would be some wear, it's just something you have to allow for when you're cutting. (Unless you take Rich's scraping class). Hows the crossfeed screw and nut? If you screw the nut on and try to move it back and forth, it shouldn't have any slop in it. You can compensate for that when cutting by always taking up the backlash, but you'll find if it has a lot of wear it will be hard to hit the dimensions you're going for by using the dials. Of course you can eliminate that problem by just mounting a dro on it while your in the process of "cleaning" it.