M101 fixed
Same image as before but with the gradient fixed.
My current workflow for dealing with RBI is:
*Take lights with RBI flood on (5s x 5)
*Take darks the same way
*Take flats at a higher temperature with RBI flood off
*Take flat darks the same way as flats
There is an ever so slight brightening in the corners. I'll investigate this if it becomes an issue.