I was just going to rotate my tires myself for the first time because I don't want to deal with bringing it in, and worrying about someone messing it up or scratching my wheels, but was wondering about the balancing. I never thought about that but I guess they check that when a shop does rotations. Do I need to worry about that and just have a shop rotate them, or do I just need to worry about rebalancing if there is a vibration I notice and go ahead and rotate myself since everything seems fine?