I discovered a feature in BackyardEOS that's probably obvious to everyone else, but took me far too long to realise - that you can take planetary video in the "5x" mode. For some reason I thought it was for previewing / focus and it didn't record.
So these images are really 1 accident and then "OMG I can do that" heaps of video taken...
Here's some of the images. All processed in Autostakkert with some light cleanup processing after that (levels, sharpening)