Not sure what the concern over enlarging the pin holes is all about. That's what the bridge pin reamer is for. I didn't have a reamer so I used a round file. If I had a belt sander, I would have used that instead. I couldn't figure a way to hold the pin in a vice to hand sand it without marring the finish. Not being a luthier, I was afraid the reamer might cause splintering on the exposed surface of the bridge. That was just an educated (uneducated?) guess. Anyway, being very careful (3 hours later) the four holes were finished. As for affecting the sound, to me the snakewood pins has improved the sustain. If I knew how long it was going to take, I would have looked for a competent luthier to do this for me. My ignorance causes me to start projects that I shouldn't. The OP said "any feedback is welcome". My earlier posting was made for feedback, not a recommendation.