I'm just back from tonight's gig, and as usual, I had a guitar stand with 2 basses, both black n maple Precisions . Obviously, there was only one in the stand when I was playing. I take a spare as years ago I had a Precision which would suddenly stop sending any signal to the amp mid song, and have never forgotten that feeling. I just feel more comfortable having a spare there. I used the same bass throughout the gig, but will continue to take two because the law of sod dictates that if I don't, the one I take will fail.