Wow. Just looked at this thread.
You guys are serious astrophotographers.
I'm just starting to play.
I have lived in the LA metro area most of my life, so no clear skies for me.
But now that I have a home in the mountains, I'm gonna try my hand.
No stacked shots yet, and I don't have a drive.
But I have a full-spectrum camera and have ordered a UV/IR cut filter (H-alpha pass) that I expect next week.
Here are a couple of unguided shots without the H-alpha pass filter.
Kinda mediocre, nothing like the great guided shots that you are taking, but hey, baby steps.