For the past year and a half, I've had flats on my P-bass. Now, I'd like a different sound, so I'm going with rounds (yes I know, flats and a P-bass go hand in hand, but I do need something different). The thing is, I'd like to keep the flats after I take them off. What I want to know is will taking strings off and after a long time (say 1-2 years) putting them back on, possibly hurt the strings? I probably shouldn't be too worried, since flats are built like tank armor anyways, I'd just like to be sure. Thanks.