>Also, can anyone explain what Robert means by "more zero-centered?" Avery, Add up the offsets for the different versions. Bob's A centered version is 20.3 cents high of ET, while his zero centered version is 0.02 cents high of ET. Bill's figures are A centered (or maybe B, since they both are zero offset), and total 10.8 cents high of ET. Actually, averaging would be more representative of overall tension deviations, at +1.69, +0.002, and +0.9 respectively. As to why the differences from post to post, I guess shift happens. Ron N
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