Before removing the old soundboard, I drilled 3 indexing hole through the old soundboard into the rim. Pins are inserted into these holes along with indexing pins that have been installed through the new ribs into the rim. I now place the fitted new soundboard panel on top of the rim, and press down to make indentations into the new board. From these indentations, the old board is placed on top of the new board, and the 3 original indexing hole are aligned with the indentations on the new board. The old board is then used as a pattern to drill all the hole in the new board, including indexing hole that were drilled to locate the bridges before they were removed from the old board. The indexing holes from the ribs are used to locate the ribs on the new board. This provides a very accurate method of locating and transferring all measurements from the old board to the new.
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