Yeah I hear ya... I've been looking at dark frames from the 8300 based sensors for months prior to actually ordering one, they arent bad at all when cooled below -10c from what I've seen... -20 would be very clean I'd imagine.
My main reason for advocating the QHY8 over the QHY9 (assuming both are OSC) is that the QHY8's QE is better.
