I asked the late Don Allen this exact question some years ago, and his response was that the marks in the finish were unavoidable if you wanted the stylus to track accurately. I thought I would go right to the source, since he made the pantograph tool, and I appreciated the honesty of his answer. So for me the answer is don't duplicate an original if you value the finish on it. In my case it ruled out renting or borrowing a Ballard stock I particularly liked to copy.