I haven't posted on this forum for a while so here is one to enjoy. I bought this 52 guitar several years ago and in fact I was using the neck as a template to carve my necks. After stripping the finish you can see that someone used screws, nails and glue but the wood at the break is beyond repair. Before starting the repair I came up with a process that would allow me to use my existing templates and machining. The key for this was a 2-1/4" piece of wood. I'll call it the "blank" and it has to be perfectly square and straight. First thing is to remove the existing truss rod. I found center line of the blank and centered a 3/16" dado going thru the blank leaving both ends of the blank solid wood. Then I took neck and fastened it to the blank with two sided tape. I know the depth of a 52 truss rod dado so I removed most of the maple spline with my table saw and dado. I made certain that I stopped before the truss rod anchor. With a razor blade I removed the maple by the anchor. With all of the maple spline removed the truss rod came right out.