<< . It's just another set of problems to trade off. Perhaps a better spring with a sealed bearing roller at the working end >> I just finished working on a small German piano, a "Wolframm". The una corda return spring has a roller bearing on the end of it, and it works beautifully. Very light effort needed to shift the action. Ed Foote RPT http://www.uk-piano.org/edfoote/index.html www.uk-piano.org/edfoote/well_tempered_piano.html
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