Hello,
Knightrider. No not that I could see anyway I wasn't really looking. I'll go back and have another look though so thanks. But in any case things worked out fine anyway.
Jason. Thanks for the detail. I did end up with the right hand image after everything was finished. It was a bit of a mission but I feel like I've passed some kind of initiation ritual and have become a true fledgling astronomer.
Simmo