I'm sure they'll hook you up w parts,but I doubt the string is an option. Anything is possible though. I disassembled my Cheetah and it looked like the idler wheel was bent. I call CS and told them I bought the bow off craigslist used and what the problem was. They said I could send the part to them and they would send me a new one,or to have my dealer order one and they would send it at no cost. I took option "B". My dealer called yesterday. My part is in.
moral of the stoey: you won't know unless you call. Be professional and kind w/o attitude and I'm sure you'll get results. Good luck
'07 HCA Iron Mace
'08 Martin Bengal
'11 Martin Exile