The ribs are often pre-crowned to accommodate the arc established on the inner rim. They are shaped to fit the inner rim mortises and sculpted for optimum balance and sustain. If a piano warrants a new soundboard, a tightly-grained Eastern Spruce soundboard panel (at 5% moisture content) is fitted to the rim with the grain oriented in relationship to the rim. The board is sanded and finished with varnish. Most of the spruce shims used are from old soundboards of the same era. The cracks in the old soundboard are planed open and seasoned spruce is inlayed into the board. The glue joints are carefully inspected to ensure the soundboard is attached solidly all around the rim. The ribs are reattached to the soundboard where they have separated. This is necessary because of our dry Minnesota winter. If the existing soundboard requires repair work, the old finish is scraped off the top and the instrument is covered in pads, heated and dried down to 5% moisture content. Side-bearing and string spacing due to bridge pinning is noted. Down-bearing adjustments are measured before and after the piano is unstrung. ![]() Changes here may differ from factory positioning. Any changes in plate positioning here will affect the action later. The plate, or harp, position is measured within the case cavity. ![]() Belly work involves: Measurements and string removal
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