It's embarrasigly crude really, just a C shape of rough plywood with a mark on, but it allows accurate measurement of the thickness of the box. 4th December 2000. Continued working on the inside of the soundbox. The sides though are between 10 and 20mm thick. 15th December 2000.
Progress is slow, what with early evenings, rain, and working on the car.
8th January 2001. It's made of a scrap of spring steel, ground to shape with the angle-grinder and then filed, hardened and tempered and finally sharpened and given a yew wood handle. I have been looking around for a straight gouge at the Oxford market but no luck yet. Today I made the three mortice and tenon joints between the three main components of the harp, using a narrow chisel. I started with the join between the neck and soundbox.