I recently bought a Standard American Fender J-Bass V (my first "real" bass), and the first day I had it, I wanted to tune the truss rod. I like low action, so I wanted to straighten the neck. After having turned the truss rod bolt 1/4 of a round, without a lot of effect on the neck, something broke, and it turned loose !!!! (and I didn't sleep that night...) The seller was nice and proposed me an exchange. I am expecting the new one to arrive next week. But having to adjust it to my taste already makes me pretty nervous! Did anybody have this kind of experience ? Did I do something wrong? Any advice / help will be greatly appreciated. Thanks!