well the seeing in melbourne was great (as the jetstream chart would indicate) but the clouds were terrible! one of my most ridiculous observing attempts ever, but ultimately successful
setup when i got home at 10:20pm under near total cloud cover, but sure enough i got a few 30 second glimpses through very small cloud breaks around 10:40pm at transit time and when the seeing was good the impact site was clearly visible at 120x in my 8" dob (my first observation of this after poor seeing on saturday).
then clouded out completely for ages, but got a nice clear break after 11:30pm. even though the spot had rotated a long way i could see it clearly in the moments of good seeing (which were very good for a central city location). bumped the mag up to 200x and watched, even until 11:50pm (70 mins after transit) when the clouds returned.
the comparison with a shadow transit is certainly reasonably accurate. the better the seeing, the smaller and darker the scar appears. at transit time it did appear elongated, but later on as it rotated i could not discern that anymore.
Phil