Having been prevented by the clouds on Monday, I only needed to wait a couple more nights before catching this one:
This is a stack of 85x 1-min from the Mx716 on my C8 operating at f/3.5.
The comet is only 11th magnitude, but was high in the sky (near Cassiopeia). It's tracking so quickly across the sky that I had to re-aim halfway through the sequence (hence the gap in the star-trails).
And I've just realised that not a single one of my exposures contained a satellite trail!