Let me start by saying that this was nothing I was taught to do; I could not afford lessons as a kid... When I string my basses, I always start with the center string (5'er A string). I next string the D, the E, the G, and finally the B. After stringing it, I place the palm of my hand under the strings and lift on them fairly hard. I do this to stretch them fully so they stay in tune. I've been doing this for 19 years or so and haven't had any problems. It just occurred to me that I could possibly do some damage to my bass. Any experience to share?