A lot of times my tips are shaped in a way that I can’t really clamp them, so I’ve used super glue. I never think it’s going to hold up, but it has never failed me. If I can clamp them I use TB3. Unibond will surly work, it’s just more involved with mixing a special batch just for the overlays.
If all else fails, a Sheetrock screw through the middle works well. Roy taught me that