None.
Instead, strip the board, kerf 1/4" along board and rib joint with a 90 deg bit in a multi-tool, the entire length of the rib, both sides of rib. Reglue the entire length of rib, to new wood with epoxy in the kerf. It works well, and results in a board with structure.
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Jim Ialeggio
grandpianosolutions.com
Shirley, MA
978 425-9026
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Original Message:
Sent: 05-03-2020 20:23
From: Stephen Snyder
Subject: Soundboard/Rib Clamps
I need to secure the soundboard to the ribs on an old upright piano. I haven't done this for. many years. All of the strings are removed so the board is accessible. What clamping system do you recommend? Thanks.
All the best,
Steve
Sent from my iPhone