A very nice 4945 Mike. One of your best. I couldn't see any red spots but I agree it could be RBI. Your camera has RBI preflash so you try that out.
Although I thought RBI fades out after several subs. High cooling slows down its fade out. But you would need new darks with RBI on as well as the noise will be different. Its worth a try to see if this helps it.
Greg.
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