My washers are dished as well. Have you tried one of the standby blade centering tricks? You can either loosen all of the screws and partially open the blade and then re tighten them while pushing down towards the butt end of the handle on the scale on the side the blade favors while simultaneously pushing upward towards the pivot on the other side. You aren't pressing the scales together, your shifting them up and down to center the blade. I find it easier to balance the knife on a table at a slight angle so only the bottom corner of the scale you want to push up it touching the table, then push down with your finger on the top corner of the opposite scale while you tighten the screws. It's a bit of a juggling act and kinda dangerous unless you tape up the blade first, but it works most of the time.
Your other option would be to tighten the pivot all the way and loosen the body screws, wedge a folded up piece of paper in between the blade and the scale so it pushes all other way over to the opposite side than before, then tighten the body screws, starting with the bottom and moving up towards the pivot. You can then remove the paper and back the pivot screw off a bit until it is centered.
