I have a Fender Mustang that keeps bowing. In a temperature and humidity controlled environment, I've had to make several adjustments over a two week period. The two basses in the rack next to it, an SX jazz and an Epiphone eb0, have barely needed tuning. So it's not environmental. The strings are stock Fender rounds, so it's not high tension strings. It has also been one of the easiest basses to go out of tune I've ever owned, and I've owned quite a few. Does this have a chance of ever stabilizing, or would you guys just write it off as a lemon and try to recoup some of your money. Edit: I've been doing my own setup for years and have never had a bass give me this much problem before. Maybe its operator error, but I don't think that's it.