Everything I did on the ED80 on Saturday night at UDSC was ruined - I had not tightened the T-ring properly so the camera moved out of focus after my careful adjustments. This was on my secondary rig based on the CG5 mount and I hadn't got it set up to preview the images on the laptop, so I didn't notice.
Doh!
However, the good news is the the CG5 tracked well enough for the ED80 so I can now use the C11 on the EQ6 simultaneously with the ED80 on the CG5.
Mark
Another laptop would help as well ;)