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Hi Cody,
Like you, I’ve been butchering my scope recently to chase that extra few percent. I live in a Bortle 8 area ( although I think even that is conservative) so most of my work has been to limit stray light and gain better contrast. To me your spikes look good. The focuser tube will cause vignetting more than affect the spikes in the center of you field. If you’re interested in the affects of your light path you can put the details of your OTA into “ Newt for the web “ ( google search it ) and it will show you the ray trace of your OTA and any obstructions.
Cheers
Ryan
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