> What kind of dressing/filing is done to the duplex bars? They have > little grooves like the capo...similar technique? I agree with David Love. It's unnecessary, or should be. If anything you do with the finish on the duplex bars, front or rear, make any difference, you have a severe design problem that won't be fixed beyond the superficial by anything you can do with the finish on the front or rear duplex bars. Ron N
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