JOE OFFER...10 points!
I can change 'em in about 6 minutes IF NUTHIN' GOES WRONG!
...but something always does (like stickin' a wire straight through your finger) or discovering the one string you're replacing ISN'T in the package ('cause you took it out three weeks ago, promising to replace it the next day)
Usually I have at least two instruments on stage with me, so I ask a friendly face in the audience (most audiences are fifty percent musicians) to change it for me.
Bummer, anyway. Tom Rush (who broke a lot) used to tell long shaggy dog stories.