I've got a gig coming up sometime in december, and I was wondering what it'd be worth to change the strings the day before the gig. I use an Ibanez gsr200 and I have used the stock strings since I got them, having no real reason to change them. I'm considering using either D'arddio .045-.100s or GHS Boomers. The reason I ask is because I'm really curious about string stretch. I know it's a big problem with guitars, but I've never changed my strings on this bass before. Do bass strings tend to stretch mid-play and lose their tune? or should i string it, tune it and be good to go?