I guess this is not something often done as therewere no responses. Well I bit the bullet and purchased the c-t adaptor and thought I would report back that this works fine, the greater the size in mm of the eye piece the greater the curvature on the chip but I am sure some spacers would fix that, the 3.5, 5 and 8 mm eye pieces are perfect and you really get very good magnification, when I get a dark sky and have it set up I will post some results.
Thanks for that info Anthony. I have an 8mm Hyperion which I have yet to try with my GSTAR2 which I have had for about 3 months. I do have the adapter that lets me attach the camera to the lens, but opportunity is what I need. eg. clear skies, and clear head! Been very busy of late and often feel just too tired to set up, and when I feel fine, the clouds roll in!
Robert