I have a Cabalas Outfitter PL-1 bow that I have hunted with for two seasons. I do shoot regularly especially starting in July or august. My string has slight fraying in the peep sight area but when I wax it it looks fine. One guy told me that he changes his every three seasons. I know it might be safer to change it now but I shoot very well with my setup now and really hate to change it all up if I don’t have to. It came with a 401 low stretch string.

So here are my main questions:

1. Would I be safe leaving it on for a 3rd season if the string rally does look not frayed very much?
2. Should I change the cable every time you change strings (I've heard mixed about that from some people)?
3. Does anyone have any bad experiences form strings breaking because the left them on to long and if so how long was it on?