Since you have already powered the knuckles,
My guess would be the capstan cushions and or the balance rail bushings.
Just a thought . . . maybe the pin was removed in order to measure it for replacement as the tuner didn't have a ruler or a micrometer with him...?...
The only difference between tuning a pipe organ and tuning a stringed instrument is that varying the pitch of a pipe has no effect whatever on the adjacent...
Hi Ken -
I was wondering how your concept of a NYC piano tuner might have evolved, so I looked to see where you are located. You're off the hook,...