Thanks everyone.
As it turns out it was because of reflections. During the day I used matt paint on my 2inch - t adapter. Additionally I used a "Sharpie" on some areas of the OAG this resolved the issue.
Paul,
Thanks for your advice. My focal length measurements for the rc8 as seen on a solved pinpoint image is 1608mm. I hope this might help someone else.
Trent
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