Hello, I have a letter C I want to Boolean onto this disc-charm, but for some reason it just won't Boolean.  Both parts are solid, and yet they won't split, they won't trim, nor any Booleaning. Can anyone diagnose why this is?  All the other letters worked out just fine.  While probably not super critical, just really annoying. Thanks for any help! P.S. Is this the right forum for such questio…