I posted this question on usenet, thought I'd see what y'all had to say. I've flown many times with my bass, always carrying it on with me in a gig bag, and tucking it away in the overhead compartment. It always worked, but I NEVER failed to get chewed out by a flight attendant on how I wasn't supposed to do it, who also tried to get me to surrender it to be gate-checked (i.e. they give you a red tag receipt, then place it in the luggage compartment with everything else, then have it waiting for you plane-side as you depart). I've grown tired of the hassle, and with the onset of the new, smaller regional-jets, there simply isn't room in the overheads for a bass anymore. Plus, I have 3 plane changes next week, which means 3 times the hassle. SOOOOOO, I found an ATA flight case (Anvil-like, but not Anvil) on ebay, and I'm set to check it with the rest of my luggage. Big question, I've heard that I should detune the strings to take the tension off the neck when shipping it this way. Someone surmised on usenet that it is to compensate for depressurization in the baggage compartment, and that doing so will avoid necessary truss rod adjustments on arrival. I don't really buy into this, as I've ALWAYS had to make truss rod adjustments anyway due to temperature and humidity differentials between locations. I'm talking a bolt-on wood neck bass here (I'm not taking my Modulus this time, which of course would totally alleviate the concern through graphite). Any views/opinions?