Greetings. I made myself a fairly nice-sounding open back a year or so ago, but I'm wondering if I shouldn't have shaped the 3ply rim more before putting the tone ring on. In particular I was wondering if anybody knows whether cutting the inside part of the rim in a conical shape, so that the walls slope towards the middle, away from the tone ring, would have a positive effect on the sound. Any advice? Thanks, Roy
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