Day 104 Friday 4th July 2014 C14 out of action.
The problem persisted and I was unable to start up the mount so I posted a description of the problem in the Paramount ME forum at Software Bisque which is normally answered fairly promptly by one of the Bisque brothers based in Boulder Colorado. I did realise it was 4th July so I don't expect a response until next week. I decided to strip down the telescope - removing the C14 and the balance weights. This had no effect at all - the mount on its own without load had the same problem.
The other day I installed the polar finderscope for the CGEM. This video shows the installation (from Mark Zabokrtsky on You Tube). My finderscope does not have the metal ring.