Thanks for the advice, but I've owned and worked on my own basses for nearly 30 years (except for a Rick, on which I did the following recent adjustments based on the good recommendations from Joey and Cassius - thanks for your help, even if it didn't quite solve the problem). I have tweaked both rods in both directions (I'm a scientist; so experimentally one, then the other, then both, and viewed each response). My first thought was exactly what you posted, but no. Two 1/8th turns (tightening) to both rods over two days, and I lost my fifth "fret" harmonics. Too tight; but still the same buzz. If anything, maybe they were too tight as a result; loosened them up a bit one at a time over 4 days. Neck didn't change too much; while still basically dead flat, the same issues present themselves (but the harmonics came back nicely). Buzzes still there, but changed double stop positions somewhat (I only get truss buzzes on certain double stops).johnallg wrote:The reason the rod rattles is because it is loose in the channel. Snug the nut enough to make tension, but if the neck began where you wanted it, don't tighten any more. That should stop the rattle.
I took the whole thing apart last weekend to remove the rods and couldn't budge them (I wanted to add the heat shrink 3/16" tubing John Hall recommends as being the latest on their bass trusses). Residual paint in the body/neck pickup cavity concerns me about using the nut driver to move them into the body cavity.
Sorry to be a bit obtuse; I know what I'm doing in general, having 5 fretless basses and an upright that I have worked on regularly, but this is a bugger.
