I was looking at M1 last night too. Unfortunately my northern horizon looks straight into the lights of Gosford, so it becomes a very unimpressive object, even with 20 inches of aperture. It responds quite well to an OIII filter.
At the end of the day, I think M1 is a very disappointing visual object....better left to the imagers to take long exposure shots for us. M2 is far better!
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