Back linings are solid linings of two-ply laminations.
While the linings dry, the sides are given a thorough sand down with a large sanding board to create a lengthwise arch.
Linings on the treble side is glued on.
I leave the glue to dry up overnight.
Next, the installation is given a final sand down, prior to receiving the back. (see the lengthwise arch against the flat sanding board?)
Back linings completed.