ORIGINAL: 98Redline
the string and cables will never stop stretching.
If you are even remotely considering shooting a peep without an aligner, the first thing I would do is replace the entire string and cable set with a good custom set in something like 452X.
Mine is Fuse all the way, and I have had no stretch at all. None. Nadda. Zip. Zero. I shoot a peep w/out an aligner and it has NEVER failed to open properly. IMO, the Fuse string is right there with the best. There are some minor differences, but nothing radical.