After the ribs are shaped and fit into the rim, the next step is to cut the new board panel, and fit it precisely into the rim of the piano. I purchase Eastern White Spruce panels already glued up, sanded to thickness, and slightly oversized. The old panel is used as a pattern to match the grain angle. The shape is traced onto the new panel, and the new panel is again cut slightly oversized. Now I will hand fit the panel into the piano as perfectly as possible, marking and removing material along the edges of the panel. This is rather tricky because of the shape of the rim being numerous curves and only one straight side. I plane the straight side to match the straight side of the rim first, then proceed to mark and sand areas that need material removed until the panel fits into the rim shelf.
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