<< I seated and lifted strings, and attempted to get clean termination points, all to no avail. There seems to be adequate downbearing, and odds are, negative or inadequate downbearing would affect all the strings of a unison, no?>> This sounds like a notching problem. You may need to pull a notes strings out of the way pull the pins, renotch this note, and reinstall the pins with CA before stringing it back up. Is this much work justified by the rest of the piano's condition? Every situation is different. Good luck, Ed Foote RPT http://www.uk-piano.org/edfoote/index.html www.uk-piano.org/edfoote/well_tempered_piano.html
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