Hello, I would like to ask for some advice nad have a few questions. While adjusting the truss rod due to high relief (0,8 mm i.e. 0,0315 inch) it was broken. A 10 mm (0,39 inch) piece remained in the adjusting nut. The truss rod was broken just behind the D washer. I suppose the thread was seized and/or the steel of the truss rod was week. I would like to fix this bass because I love its warm deep sound. Local luthiers are not happy with this job because of the risks. If the fingerboard cannot be loosen and removed in one peace without any damage the frets shall be removed, the fingerboard shall be restored and refretted. The costs are near to the worth of a new bass. I had an idea. I realized that the truss rod remained in the aluminium U canal in the neck has got still about 10 mm (0,39 inch) thread. I tried to cut the fingerboard beside the first fret (at its head side), remove its peace. Then I scraped the aluminium U canal by a drill to make the end part of the truss rod free. I filed the burr from the end of the broken thread. So that I could reinstall the D washer and the nut. Finally I glued the piece of the fingerboard to the neck. Other solution was using a StewMac truss rod repair kit. Despite, I think it is for cutting wood hole only, not aluminium U canal. My questions: 1. Do you have any other idea to fix the broken truss rod of my El- Capitan? 2. Where can I purchase a replacement neck mounted with truss rod and fretted fingerboard? 3. Where can I purchase a fretted fingerboard and a new truss rod? Thanks for good advices and answers!