Greetings,
I read in Danny Boone's Regulating Grand Piano Touch and
Tone book, that flattened knuckles can be "bolstered"
Yes they can, by a number of methods. Common to all of these is that
the leather usually remains a bit loose around the newly bolstered
knuckle core causing much extra friction and accompanying sluggishness
to the action.
No matter which way you work it... when parts get old and worn the fudge
factor becomes increasingly apparent. Knuckles are easy to change btw.
And not particularly expensive either.
Cheers
RicB
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