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Paul,
Many thanks for the long post. All very good advice! In particular I don't think my polar alignment or balance is quite good enough though Patrick Wallace says that Protrack will compensate for poor alignment if there is a good and accurate model. But, for sure with good PA both guiding and Protrack will not work as hard.
For sure in better seeing I'm seeing far fewer spikes. What I found (findQ!) impossible to think through is how I could only see a spike in one axis given the camera at 45 degrees. Next time I see this I intend to guide in Maxim and see if I get anything similar.
Thanks,
Peter
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