Great Tuco! Mine is still holding also. I used Loctite Super Glue in Gel form. I think it is better than the regular type because it does not run as easily.
I also cut a half moon shape for the broken-off top like you did, then also put another second piece on the outside covering the whole area from the coil to the very top to secure it. I wish I could take a picture and show you.
Yes the glue held, but try to sand(paper) the areas ahead of time before gluing. Yes Loctite Super Glue is very good but look at these. You can "Google" these glue names one at at time to find out more: Miracle Glue, The Last Glue, Lightning Bond, Pasco Fix, or Turbobond Powerglue(in Australia).
They are all about the same glue, they do work very well, and I think all of them are made in Germany and a bit better than Super Glue or Krazy Glue. They all contain a highly distilled alpha cyanoacrylate ester and some is medical grade for sealing skin instead of using stitches. Very good for metal, rubber, most plastics, etc. As industrial Grade German Super Adhesive. If you've ever heard about "German Super Glue" this is the original German-made adhesive.
Read this article: Super Glue vs Miracle Glue
http://www.articlesnatch.com/Article/Super-Glue-Vs-Miracle-Glue/31685