I know what your saying Alex, but flex might be an issue, I can try it when the rings show up.
Trevor, that's binned 2X so only about 2Mpixel resolution and ccdinspector wasn't kind to it's collimination
Rob, are you running out of infocus? Did you try just reversing your wheel to see if it will work? I ran all night at -25C, without the nosepiece or any fogging issues at all and you know how hot and humid it was.
I think I'd prefer to keep the nose on the camera though, it will be a lot easier to clean that way.
In the light of day, my wheel problems will go away when I cut the tube. That will force the drawtube further away from the focuser body and the wheel will clear it easily then.