Here' my take on this. If I am missing something please correct me, but everyone is focused on the black plate attached by 2 torx head screws. But on the sliding table, underneath is a tang that is molded into it that the plate reacts against when locked. Mine has no clearance as far as I can see. Problem #1 maybe tang is too long. Or #2, look under the miter scale, there are what I would call tits ( one of Carlins favorite "cute" words) , that holds the scale above the rest of that part of the casting. Perhaps these are too high and need to be shaved down. Of course this is all speculation. Thoughts?