I have an old lightening flight PSE . I bought it used about 15 years ago and it was in great shape then , and still seems to be in descent shape . The last time I changed the string was about 4 years ago . The string still seems to be in good shape and I keep it waxed pretty good . At what point does the bow become to old to shoot ? Do the arms just all of a sudden break when it gets old ? It still shoots very good and very accurate and have killed quite a few deer with it , just want to avoid a trip to the ER .