I put on a new set of strings on my bass, not too long ago, then got a set of DR Low-Riders as back-up/the next in line. I've heard nothing but good things about the DR strings, so I'm quite anxious to try them out. But I just put a new set on. My question is, do you wait until your strings are worn out to change them or do you change them whenever you need a new tone. P.S. The strings I have on are nothing special, a med. gauge nickel from a local music store.