I've gone through two custom strings from Prostring archery in the last season and a half on my 04 Mathews LX. The serving is separating where it contacts the hard end (let-off) of the cam. After deer season the axle to axle length of the bow was an inch longer (36) than normal. Is this normal wear and tear or could this be a sing of something else (form error, overdrawing, etc.)? Any help would be appreciated and I am considering a string change, maybe Winner's Choice. What about X-coat and roller guards? Thanks.