Okay brothers, I am shooting a PSE Nova set at 60 lbs @ 30 inch draw. I've had the bow for about a year now. I normally shot it about 5 days a week. I wax the string before every pratice session. I have been told by a pro shop that you are supposed to change the string out every year. Is this true? If so what are the advantages to using a custom string rather then a OEM replacment?