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Hi Matt
Good effort
Inevitably onion rings occur when the seeing is bad and you push the wavelets too far to bring up detail. Technically, I 've wondered whether it has something to do with the pulsation of the planet's perimeter resulting in uneveness which becomes enhanced during processing.
Someone else may have a better explanation.
Wait for a better day and post back---most interested in your posts because of your similar aperture to one of my scopes!
ron
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