After I had posted that message I had a deja vue and was sure that I had displayed that picture before
I have just used the wonderful (as in I wonder how it works!!) Google image search system
and although it completely failed to find this thread it did find the image on my own website plus the old thread that I remembered:-
http://www.corfid.com/vbb/showthread.php?p=97588
which I will now resurrect