Appreciate all your advice Martin,
It is a learning curve.
I am still trying to get my head around the Flats Aid Histogram, been trying out a few combinations to see what changes with what, didn't try that Local Button.
I am using APT 4.01
It appears i need to work on my Flats a bit going from what you have there.
Mine are a bit more to the middle, I am guessing that is due to either too high a ADU or too bright a light.
I either need to lower the ADU to something similar to what you have or dim the light source a bit more to get the histogram more over to the left.
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