[raymo]

Martin, To produce fine lunar images you don't need BYEOS, or need to worry
about pixel ratios, or introduce anything else that takes away from the simplicity of what you are doing. You can't beat the laws of physics; your 8 should out perform your 6, just as my 10 out performed my 8. I assume that you have checked your 8's collimation. On nights of really good seeing you don't even need video, or to stack still images. Some of my best lunar shots
have been single frames.
I hope you don't mind my commenting on your images, but the two smaller
scale ones are over sharpened and over contrasted, so that the moon doesn't
look real. I have posted a correctly processed image for comparison.
Hope it helps.
raymo