Now for completing the little tasks that represent the "fine points" of instrument building. Installing the pickups, adjusting the "action" by making the nut grooves deeper or shaving off some from the bottom of the saddle. sanding down the tiny little imperfections if found and refinishing, filing the corners of the nut smooth, Lots of little tweaks and then lots of playing the instruments and listening for problems. I have had to make a couple of new nuts because I grooved them too deeply. Installing a under saddle pickup means you must shave the saddle thinner
This is a little device I made to hold bone as I shape it for nuts and saddles. In this case, after installing the under saddle piezo cable from the MiSi pickup I had to sand off bone equal to the thickness of the Piezo. Holding a thin piece of bone while sanding is hard on the fingers. This gizmo is the answer.
It works like a charm and sure makes a difference when holding bone up to a belt sander. A long bolt and a wing nut plus a couple scraps of wood. Probably cost a buck and a half.