ORIGINAL: Hunter06FlKy
i've always used a peep with the rubber tubing. that's the only thing i know. i've learned that it does help to replace the tubing if you're using the black rubber about once a year. furthermore if you use about an inch or two of tubing extra, less stress is usually exerted on the tubing, at least it doesn't seems that it tears as easilly.
This is very important when installing peep tubing. Too many times I have see the tubing cut too short. It should be just short enough to rotate the peep at full draw. You don't want to stretch it to it's limits or it will fail more often. It does not need a lot of tension to align the peep. If in doubt as to the lenght you need cut it long, you can always trim it till it aligns the peep. Once it does, measure it and you know in the future how long of tubing you need.