Wife asked me to make her a ring. She bought everything and this evening I tried. ring hole turned out great, so I super glue the ring insert in by super glueing wood then I pushed insert in, then finished sanding and use super glue finish, turned out really nice until I removed from pen mandrel the inside insert was covered with super so we took turns scraping glue out with a blade screw driver and now has sharp edges. The wood I made it with was goncalo alves I'll attach a picture I hope someone will help and tell me best way to glue insert. Thanks!