I was bummed when I snapped the end off my Smith sliders, and had no luck with epoxy. Then I hit on the idea of shrink tubing (available at any Ace in the electrical aisle). I doubled it in the middle of the repair, which meant putting both pieces of shrink tubing on the glasses, then heating them one at a time. I think if I did it again I'd put the smaller piece on first for a cleaner look. Anyway, it seems to be holding well - maybe someone else can use this.