Well, a fair bit has happened since I've last written. I received a new replacement upper board for the QHY9 and it seems to have resolved the problem, so far so good! I've also replaced the USB hub and it's working for the time being as well. Lastly, I upgraded the memory in the observatory machine to 8MB, so things seem to all manage a little better.
I've been thinking a lot about whether I should sell the QHY9M and move to a one-shot color cam. I seem to have a lot of difficulty getting images with the QHY9M that I'm happy with.. it's either a matter of not having the right calibration frames (flats), or I don't get enough color subs to put together a good image. So, I've been thinking that if I were to switch to a color cam, it would drastically decrease the complexity of the setup.. no LRGB to deal with, only one set of flats, and always a color image at the end of the night. The downside of course is the reduction in sensitivity, but I don' t know whether I'd even see a difference with these skies. I'm going to give the QHY9M another shot by trying to be a bit more focused in my imaging efforts and concentrating on a couple of targets at a time, tracked by a spreadsheet. We'll see.
It's a beautiful night out tonight. No humidity, clear, windless, and nice and cool. I'm imaging the Iris Nebula and will work on just it for the next few days to see what I end up with when I actually focus on something!