After the panel is shaped to fit snugly into the rim, the new panel must be indexed as I use the old panel as a pattern for drilling all holes in the new panel and for locating the ribs. I drill a hole in the end if each rib, through the rib and into the rim. Also, three locator holes were drilled through the old board into the rim before the old board was removed. After the holes were drilled, .086 dia. bridge pins are inserted with about 1/8" protruding from the top. The new fitted panel is then placed into the piano, and pressed down on the locator pins to index the new board panel. The old board is then placed on top of the new panel, and the locator holes are joined with a bridge pin. Now I can transfer all the hole from the old board into the new. When it is time to glue the ribs onto the new panel, the rib indexing holes are also aligned with a bridge pin.
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