The other night we were experimenting with software assisted drift alignment with my EQ6. I was getting 1 minute subs with a C8@f/7 with a tiny bit of trailing - have a look in my Orion thread for the images of the core. I threw out about half the frames due to excessive trailing IMO, but I wasn't guiding so I wasn't shocked about having to do that.
Naturally, I want more! But appreciate it's probably a case of diminishing returns and/or realistic expectations given the cost of the mounts
10 minutes is pretty far out there Rex, well done