I've been a TBer for many years and dabble in repairs, building, etc. I need educated advice and this is the most knowledgeable place I know. I have a J bass bought off evilbay some years ago - when I had it apart the neck stamp says '68 and, I forget how I know but, I think the body/electronics are '69 anyway, it's a player's bass and plays pretty well - has that early J tone so I'd guess the pups are original it has a wonderful neck with a slab board it was de-fretted many moons ago and had a crappy re-fi maybe at the same time now that I have my shop together I'd like to re-finish it and bring it back to full life but the one flaw is that the truss rod seems to be bottomed out - I don't think it's stripped but rather fully turned clockwise what can be done? would it be worth it (or maybe dangerous) to try and detach the board for a truss rod replacement? there doesn't appear to be any warping of the wood but the action could definitely be improved with a working rod thanks in advance!