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Hi Rod,
A friend of mine has just successfully completed collimating an RC 8 using an Orion Cheshire eyepiece. I would suggest you remove the focuser and place the RC on a bench for the initial collimation with a Cheshire eyepiece. Once this done place the focuser back on and use the collimation screws on the focuser to get the focuser orthogonal with the optical path.
Looking at you out of focus star images , I would say that number two ( bottom right had corner ) is closest to collimation. This means that stars in the bottom right hand corner will be rounder than the rest of the image. You have got to get the central out of focus star perfectly collimated. Then the out of focus edge stars may not be perfectly collimated if the optical field is not exactly flat. Also noticed some flat edges around the out of focus stars. I believe this is also a symptom of the RC collimation being out.
That's my two cents.
Cheers
Rob
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