Paul, I've done a couple of these Kimball Grands. Yes the plate bushings are a different size! And, (the ones I did), are made out of pinblock material! What I did was cut plugs with 1/2" plug cutter and force fit them. I first drilled the center of the plug with the appropriate drill bit for the tuning pins. Then, I cut the plug. It was VERY time consuming, but, IMO, was well worth it, as the tuning pin feel, was that of an open block. I loved it and would do it again. Joe Garrett, RPT, (Oregon) Been There, Didn't Like It, So I'm Here To Stay! [G}
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