Steve,
Found a good easy to understand article on calibration ( Bias vs Flat Darks )
Definitely worth a read
https://www.astroworldcreations.com/...t3-conclusions
I’m going to stick to full calibration suite for both my 2600MC and 2600MM ( Lights , Darks , Flats and Flat darks ) just to ensure all bases are covered, dark current , hot and cold pixels , Dust donuts and vignetting ( my TS GPU coma corrector causes terrible vignetting in my 8” and 10” Newts )
Cheers
Martin