the more i think about this the more i get bent. it's easily fixed, but that's not the point. i ordered some caster shims from a company i've done bussiness with before(and will agian). they arrived in a quite timely order and well packed, loose in a box. somebody picked them, by hand off a shelf and placed them in the box, and failed to notice that only one of them had the hole drilled in it for the centering pin. their alum so drilling the other hole will be no problem.