Newswire Kiesel, Carvin Guitars Custom Shop Adds Carbon-Fiber Rods to Necks By Ward Meeker - Kiesel and Carvin Guitars Custom Shop guitars and basses are now being made with two high-strength carbon-fiber rods and two-way truss rods in their conditioned Eastern hard rock maple and mahogany necks. Five-piece laminate necks are optional. Print