Repairing 3 cracks in one of our rental violins.

Left Pic – 2 cracks in the top, on the lower right side
Right Pic – Small cleat super-glued to clamp. This cleat will be glued to the underside of the crack through the F-Hole. The super glue will pull away from the clamp, leaving the cleat glued underneath the crack

Left Pic – 2 Clamps w/cleats ready to go inside
Right Pic – 2 Clamps going through the F-Hole. 1 Clamp drawing the crack closed

Left Pic – Gluing a small crack near the F-Hole
Right Pic – Another view of same crack