I can see M31 with the naked eye from here. (lat -28.8d).
My best views are with 20x80 binoculars, (3.2d field) they show all of it well.
The 12" dob with a 30mm EP (50x, 1.5d field) shows the full length if you move back and forth. M32 is bright, M110 is fairly faint in a 12", but not difficult. Perth is further south and that makes M31 harder to see.
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