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Chris, I will take an opposing view on the subject of flats. In my years of mono and narrowband imaging, I have never used flats. I consider the practice to be bordering on obsessive compulsive behaviour. My rule has always been to ensure that your filters are clean, inside a sealed filter wheel, and that your camera sensor compartment is clean, sealed, and has proper dessicant. By eliminating the flat time consumption, you can make imaging more fun. The only tools I use are a good bias and dark library, which i built over months with each of my cameras. I never shoot Bias or Darks on the nights I am imaging, I simply rely on my library when it comes time to process. I have always been satisfied with my final images. And for my purposes, including gift metal prints, the quality has been great. Save your time, and don't get caught up in the quest for perfection as defined by obsessives. If your happy with an image that is all that matters. We do this for ourselves, it's not a competition to be judged by others. Have fun.
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