ORIGINAL: stalkingbear
I'll just stick with my metal Ultra-nok until something like that happens. Seems to me as long as somebody inspects their equipment once in a while and makes needed changes/upgrades, the argument of breaking or causing string to break is null & void. To each his own.
Do as you will. I know you are basing your decision on past expereience as most of us do. Just remember that forwarned is forearmed. It's not always easy to see when the string is going to break, though, because it's almost always under the serving right at the top of the Ultra-nock.
The idea is that it's kind of like climbing a treestand without a harness. You can do it for a lifetime and nothing bad may happen. It's only gotta happen once and things can get quite ugly.
Or how about those life insurance premiums we pay? We only have to die once to collect so why do we waste a lifetime paying for something that may not happen for a very long time?