[pianotech] Key Leveling?

[Joseph Garrett]

Jack said: "Of course the very best " leveling device" ever,
was in the " Bowen Henderson" grand of Boston.
It was a dream to work with."

Jack,
And you have a picture perhaps? Or.... a drawing?  Or......an explanation
of the system? That'd be nice.

Joe Garrett, R.P.T.
Captain of the Tool Police
Squares R I