sabotloader,

It did look like the construction was very different than the laminate, that was the gist of one of my first questions. But even the laminate doesn't have a "bed", it simply has more material there that the action may or may not make good and consistent contact with. The shimming may help him learn something -- I'm just the meticulous sort and after all the pain I went through learning this stuff the hard way I'm just trying to break it down to where the feedback is most clear.