I want to get a very light weight short scale bass. I have an 8 1/2 pound short scale SX that I like very much, but playing more than an hour standing causes severe back and neck pain. I can play an acoustic guitar as long as I can stand, but my 8 pound Strat causes the same problems. I do mostly folk and country at this time, but don't want to limit my options. I played a Mustang once and it is a very nice bass. Haven't seen a Birdsong, but the good people sent me a CD and it sounds fabulous. I am sure that some of you have opinions on these basses and perhaps there are other light weight ones I should consider.