Since the linings are solid wood, without kerfs and consequently very rigid, I inlet the side braces to avoid inducing a zone of weakness as would exist if the side braces stopped when they met the lining.
Here the neck has been inlet with a truss rod channel (I use a router table for this. sorry no pics of that) On either side of the truss rod channel a rod of carbon fiber has been inlet for stiffness. The peg head veneer has been glued on to the face of the peg head. This particular veneer is an old piece of cocobolo. Its very dark for coco.