Thanks a million, bipe! I knew there had to be an easy solution, I just couldn't think of it in my overtired mental state.[:@] I tried a few shims cut out of GWS prop blades and sanded to shape last night but I could see it distorting the backplate at the screw holes, as I feared. I don't have any of them fancy angle sanders, and my only tool for cutting oddly curved shapes is a jewelers saw, so I tend to think things are harder than they wind up being......thanks again for the music wire tip, that's exactly what I needed.