Here's a first-cut try at processing the stack from that session.
12 X 600s used, plus flats and dark flats, stacked in DSS and processed in StarTools. Lots of room to do better (both capture and processing), but much better than I was getting before the filter.
No idea whether 600s is the sweet spot for my gear and targets like this, or whether there's a more optimal setting, but it was a kick to see that the mount just handled it and wasn't a limitation.
Mounts: ES PMC-8 EXOS2
Scopes: SV 102EDT, ZWO 60/280 Guide
Cameras: Nikon D5300, Altair GPCAM2-IMX224C
Software: ASCOM, CdC, AstroTortilla, BYN Pro, Sharpcap, PHD2
Computer: Thinkpad x230, Win7Pro/64