While you're at it, check the angle of the underlevers. If they are too steep, lower the pivot hole. I'll be doing that on an M today. The underlevers are pitched downwards so much that there is excessive sliding friction on the key end felts. Fortunately the piano has not had a lot of use so there are no trenches plowed outs. I like to have the key lift the underlever to being parallel with the keybed at full keystroke. This reduces the sliding friction to the minimum, near zero at full depression. -- Regards, Jon Page
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