Originally Posted by
unterhausen
I don't think it really needs to be LFB if the OP can clean it out enough to use silver. LFB does seem to be a little more tolerant of crud.
You may be right. Your choice, OP!
Doug's post is the first I've heard of problems with those cable slings. I can see if there was poor fit that some silver fillers might not have the strength. Otherwise, there is plenty of surface area.
The only failures I've seen are from poor brazing (as in the OP's example) or abuse. I have noticed that Campagnolo's guides seem to be formed from thicker stock than some of the no-name guides, so that may be a factor as well.
I always figured they went away because of paint and because a sling under the BB shell costs a fraction of what a pair of these slings cost.
Less labor as well. Just drill a hole and pop in the guide.