Quote:
Originally Posted by Cluster
I think I'll need to find a local astronomy group and get expert advice from them on collimation.
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It does look like you are missing something fundamental re collimating the scope.
If you are confident that you have followed all the online advice and tutorials re collimation it might be time to pull the primary mirror out and check that the centre spot is indeed in the centre. I have heard of some being placed inaccurately at the factory and that may explain whats happening.