I bought my MIM Jazz one year ago from Mars. For the first few weeks, it needed several truss rod tweaks to get the neck relief reduced for low action. I would loosen the A and D strings to move them aside and I would turn the truss rod a quarter turn clockwise and then leave it over night. I would tune it back up and the results were great. Nice low action. Over the year I have had to do this at least 30 or more times and although I never heard any sort of loud cracking sound or anything like that, the truss rod now turns with very little resistance. I think it must be stripped or snapped or whatever. At this point the neck wants to go towards too much relief causing the resutant high action. It's not way out of line, but I like it lower. Every two days, I loosen all of the strings and gently, but firmly bend the neck back flat by pushing with my hands. I leave it alone for a few hours and then tune it back up and the neck stays nice and flat like that for another two days or so. This is a nuisance and I suppose the answer might be a new neck. I see that Warmoth has necks for $150 and I see those Maple/maple necks on ebay from Magic Dragon go for $75 or less. Has anybody ever handled one of those?