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I agree that a good Master Bias is sufficient. The 1600s are very clean down that end in my experience. I prefer eyeballing the histograms to spreadsheets. And I have a library of bias Masters I have acquired over the years, some at different cooling setpoints that I favour, and there is almost no difference that I can detect. Even stretched to hell. Btw why shoot bias at 2.5sec? SGP shoots them at 0 seconds, basically dumps the idle sensor state. Maybe I have been doing it wrong.
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