Hi all, here's a picture of the first GSR100EXL I donated to the local Salvation Army. Ever since then I've wanted the bass back! The bass I just bought is an identical model to this one. Anyway, tonight after work I removed the strings and released the truss rod completely as suggested by @Jeff Scott to 'normalize' the neck.
Sometime Thursday or Friday I'll restring the bass and gently coax the neck. A good thing is my office is a computer room so it's temperature and humidity as controlled as a laboratory.
Anyway, the first version of the bass I sold (which I just acquired again last week):
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Luckily, the second one I just received is as immaculate as the first one. If you ever see one of these odd guys sitting in a music store please try it out. You'll be amazed at how punchy it sounds. It really reminds me of a Music Man. Growly and aggressive. Even though it's passive!