Dimensioning Neck, Purfling area
On neck, remove excess material from sides - use bandsaw carefully.
On top and bottom - set router bit in drill press or milling machine.
Set 3/4" ball head router bit 8 mm centre from edge - use guide jig.
Route to 4 mm (corrected to 3.75 mm) depth in "C" bouts.
Route to 3.5 mm (corrected to 3.25 mm) depth in remainder.
Clean up "C" bout corners with chisels to match routed valleys