Beware of the little brass leaf springs on the jacks of older mason hamlin uprights. Their intent is to speed up repetition by bending against the catcher. They tend to hang up on the catchers of new brass rail butts. Sam Grossner- Chicago As I remember, the original butts had an extra piece of fairly thick felt on the inside of the catcher where the brass leaf spring rides. I think that would help the situation. Vince Mrykalo BYU piano technician
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