The go-bar method is a trial for now. Before, we used machine screws to fasten bridge cap to root. But to use machine screws, many holes are dilled on the cap, which weakens the bond. The go-bar method saves time on dry-fitting, also creates a stronger glue joint.
This piano does not require a new soundboard. The bridge cap was removed with a router; bridge pin holes were plugged; and surface smoothed with a power plane. Bridge cap was made from hard maple, milled to match original bridge height plus 3mm additional thickness to make room to set down-bearing later on.