I didn't drill it - too scary.
But whilst searching for some charms to create moulds out of (the shop only had teeny weeny ones) I did spot a teen weeny charm that I thought would be ideal for a fixing - so here it is!
The light is not doing the back any favours - as it's showing a close up of every little thing. When making something as complicated as this - and with several 'firings' you just can't get the back totally smooth - there are too many elements - and even if it looks smooth when you bake it - it never stays that way. The solution is to sandpaper it - but as this was fragile and with so many curves, I have just left it.
I might give it another coat of paint at the back - but realistically no one will see the back!