I found that these fields give a good orientation for "LMC":
Axis [ 0.9 -0.436 0.0 ]
Angle 100
but only orient correctly if the galaxy is (incorrectly) a spiral, e.g. 'SBc'. If it is set to, say, 'E4' (which was what I was experimenting for LMC), it appears in the same orientation regardless of the fields, i.e. it doesn't use them.
Surely an easy fix, pity I didn't find it before 1.2.5 was ready...

P.S. Yes, E4 isn't really correct either - but I think it's visually the least incorrect from Sol's point of view.