Richard, The main thing that should be considered, in scaling evaluation, is what can be changed to the advantage of the instrument. In other words, if you are simply replacing strings and not changing the configuration of the plate, board & bridges, what can be changed to make it "less bad". A lot of this work is intuitive and is gained by doing. Hopefully, the experience is gained on pianos of your own or inconsequential re-what-evers. If a new board and bridges are to be added to the mix, then there is far more to be changed and improved. I advocate an "evaluation" of every piano scale that is being redone, if not for improvement, at least to see what the scale is and why it turns out as it does. I think this is invaluable to any rebuilder and do not understand why, when we have the ability to do this, that more are not embracing this technology. Regards, Joe Garrett, RPT, (Oregon)
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