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Sat and Sun are both fine for me. Late arvo/night on those days is best though cos I was planning on going into uni during the day. What's your weekend look like in terms of availability?
How about we say Saturday around 5.30 or so my time? (i think you're an hour ahead cos of DST but let me know if i'm wrong). If you want a bit earlier or later, that's fine just let me know.