There is such an array of mounts to pick from, with almost every possible variation available. Some pleasing to the eye and some not.......

After having read all the available information on here and having been given some very good pointers from Ian 53, Paul and Black Al and bearing in mind that I use the expanded Famsa tank bag when touring, it seems that the clutch mount may be the one to go for.
Clare very kindly aquired the Garmin and an Autocom for me at Christmas. Still not sure if she was just pissed-off with me getting lost and her inability to shout at me!

Any and all help will be greatly appreciated.