Hi there, as promised, here are some photos showing codes and locations etc,
Whoever fitted the Kahler was a bit brutal in their approach but it does work beautifully.
Cheers Brian.
https://www.dropbox.com/s/hanh5a9qkhstdqf/PICT0002.JPG
https://www.dropbox.com/s/i3denpk23pxtpb0/PICT0006.JPG...