Thanks for your encouragement. I am afraid a small piece of dust got into my coupling hence the shadow. I will find that this evening. I have updated my coupling to two linked PVC pipe adaptors cut down to hold the eyepiece flush with the camera lens. Everything is held in place with fine adjustment screws. It cost about $6 Australian.
I have added some detailed crops from the raw photos
http://i213.photobucket.com/albums/c...SWlimb27-9.jpg
http://i213.photobucket.com/albums/c...thPole27-9.jpg
Kind regards
Matt