Almost all measurements are taken from the centerline, instead of one edge, to ensure accurate and symetric results. The neck material shown here is mahogany, however some other participants used walnut. The headstock has been cut from the neck blank and re-glued in its angled position. Shaped headstock - The headstock has been profiled to its final shape and a veneer of rosewood has been applied. Note the steel reinforcing bar set into the neck.
Guitars often have an adjustable reinforcement, called a truss rod, to control neck bending.
In this case, the bar merely adds rigidity and prevents excessive bending from the tension of tuned strings. Top with sound hole inlay - The rosette strengthens the edge of the sound hole. It's also a nice visual touch. Shown here is the rosette inset, glued and leveled with the scaper. Also shown is a prepared rosette and a scraper in a hand made holder.