In a similar situation, I used a very sharp center punch to ding the
center of the broken portion of the agraffe. Then I went to a small
drill bit, like a 1/16" or so to begin, and drilled through the shaft.
I continued to increase the size of the bit until the hole was near the
edge of the cast iron. Then I simply took a very small awl and pealed
the brass out of the hole.
My piano was also restrung, and no damage was done to the paint! I did
run the proper size tap through the hole before replacing with the new
agraffe.
Good Luck,
Al Pebworth
Pebworth's Player Piano Center
Home of "Yesterday's Music"
http://www.pebworths.com
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