Mike10, another 570 question

Got a question about shimming the bottom rails on the plunger. Side play is good, and vertical play is good until the knives are passing each other. Then the vertical bearing on the left side gets 1/4" of play. The bottom wear plates that the bottom bearings roll on look to only have full length shims? I can't see it working out well to only shim the back end of the bottom rails? This baler used to be a commercial baler, and the bale chamber is getting thin, so we may have to live with it.

Thanks,
Josh

Mike10, another 570 question