Same trick as yesterday - 1Dx with 24mm T&S, on tripod, almost level too :-)
Only they took longer. We left them to it. I came out and looked and said "you know that is not centred"... Well, that added another hour or so to take it all down and do it again, and meant well over 10,000 images before we ran out of a 32GB card. Got some final images after transferring a few hundred and deleting. I should have scripted image transfer and delete as well!
Now to find how we make over 18,000 images in total in to a time lapse video.