I recently realized that the small piece on the pivot is attached to the scale. I'll have to think about that for a while. I'll update if I can figure out the southard.
Not sure what you mean. I don't have any scales on mine at the moment, just a couple of washers under the pivot screw and it works fine. There's a registration lug in the scale that fits into a hole in the liner but I suspect that that's just for ease in manufacturing and doesn't play any other role in the knife.