JD, I have been using the "Z" formula as criteria for scale evaluation, for many years. I have found that the graphing of this makes my rebuilds have a smoother transition throughout the compass of the piano. I have many scales on disk file that show the process. These are extensive and would be overburdening to the list, if I posted them. If I were to send them to you via snail mail, the cost would be enormous, as each envelope would weigh in at about a pound. So, having said this, I hope that you will avail yourself of the possibility that the Z formula does have some merit and try it, by using your previous scales records and re-run them using the original scale, (with the Z formula), and then a comparative with your "end" scale, (also using the Z formula). When you look at the graphs you will probably find that you have, intuitively been doing much the same, but without the math aid of the Z formula. Of course, this is speculation on my part, but I suspect, through trial and error, you have become intuitive in this regard. Joe Garrett, RPT, (Oregon) P.S. If you do not have a computer program, available, with the Z formula, I would be happy to send you an olde one. We are currently revising the program "Scale Master" from a DOS to Windows program. The one I have available to offer you is a DOS version.
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