In order for the tuners to fit correctly the Headstock should ideally be 15 to 15.5 mm thick
The neck will be carved in stages: First we will make facets, then smaller facets, before finally blending in to make a smooth curved shape for the back of the neck. In this video I explain how to mark out the neck for carving.
Here I demonstrate how to clamp the neck for carving and also recommend some Neck Carving Tools
This is the first stage of carving the neck - we need to remove the material between the two lines. The side facets should be flat and even for the length of the neck and then taper out at each end - make sure to stay within the lines.
This is the most important part of carving the neck - the Top Facet will determine its depth (or thickness).