I am working on an archtop neck and thought I'd show a few jigs I use that have worked for me. I'd be interested in how some of you other archtop builders approach the same issues.
Here's a multipurpose jig that serves as a router guide to rout the ledge for the extension and as a clamping jig as well. Keys in the truss rod slot.
Also holds the extension in place and allows clamping in all planes during glue up. The extension piece has to be thickness sanded to exactly the same thickness as the ledge cut.
Here is a jig for routing the continuation of the reinforcing bar slots. Keys in the existing slots. Same principle for the extension of the truss rod slot.
Rubber tubing works well for pulling the neck bolts into their holes. I usually put a rubber washer on the inside to retain them.
