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Hi Alistar,
If the fault follows the rotation of the camera, it's normally associated to the camera.But first ensure your laser hits the secondary dead middle.
Imagine if you hit to one side of the secondary instead of it's centre, you will need to adjust it off to one side to hit the middle of the primary. You then need to adjust the primary by tilting it to reflect the laser back to the source. Part of your collimation test should see if you can return the laser light back to the laser source, not just that you hit the middle of the primary. Thats right isnt it for a Newt? Please correct me if that's wrong.
So under the case where you have the bent light path, the star light coming in will need to follow this bent course to get to the CCD.
Your sample defocused star images are very good to demonstrate the issue.
Steve
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