I don’t have a cnc so these depth guides will have to do, I know, way Neanderthal. The hardest, slowest part of an archtop carve is establishing an accurate arch. These jigs aid in getting the depths right. I bandsaw each half of the guide as one, then rip. The diagonal arch depth was handsawn. Now just connect the dots.
The base is modified to suit the waist curve.
-- Mama calls me Texcaster but my real name is Mr. Earl.