So, Im fixing up my Guild S300D, and ive got a new nut for it ready to go. Its a nice brass one off an old martin clone. Ive cleaned it up and squared it, etc. Its a PERFECT 3/16" thickness, and its spaced perfectly. Its a hair too wide (the guitar it came from had a lot of edge of fretboard past the strings), but that can be filed down no problem. The channel it sits in however, is fuckedypoo. It is shaped like this.
Note that on the back, it is not flush up and down, and on the bottom the front half is flat and the other half is backangled. Its a hair narrow too, so id like to widen it into a standard gibson width flat bottom style a la
I've got a good set of razer saws, but how do I get one to bite in vertically at a consistant correct angle on the angled face? Im assuming once i have that sawn in I can cut most of the wood out with a rough saw and then just chisel out the bottom (unless a motherfucker knows a better way?), but Im not sure how to get that angle of cut consistant.
That's a router job, pure and simple. What you're trying to do may work, but you have a huge risk of tearing out the wood - especially if the headstock is bound as I suspect it may be.