In a case of vertigris, can just the flanges (and of course, center pins) be replaced? It seems the parts most affected by vertigris are the center pins and the bushings in the flanges or shanks. There might be a little vertigris in the birdseye of a butt or wippen, but will that spread to the bushings of new flanges? I could see replacing an entire set of wippens if the jack and balancier pinning was also corroded in addition to the wippen flanges, but if not, do ya really have to replace all the wippens? (I'm trying to save the customer money by just replacing flanges and not having to replace wippens, or in the case of a vertical, the hammer butts.) --David Nereson, RPT
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