No this is not drivel. You have cleared up many things that I have never been able to sort out.
I understand your problem of trying to raise interest at a time when wind generators were not the "in thing". I have played with the things on and off all my life but only on the last 10 years has anyone else taken the slightest interest. I was quite relieved to discover Hugh Piggott's work and that renewed my interest.
I am still not sure what generators you had supplied, presumably the later ones were the ones Lucas produced for the Freelite, but if you say there was equipment for winding the field coils then at some stage it seems as though some modification was made. The original dynostarter armature would have needed rewinding and the fields also needed rewinding.
There was indeed a skew core version of the Freelite armature and I rewound one for a friend once but it is not the same core as the A900R, the slots are quite different.
The Freelite cores were semi closed slots and the windings are held in by slot wedges. If the skew core had the windings held in by banding wire over low parts of the core then it would have been the original open slot core.
Thanks for confirming the date of the D46, they seem to have been later than that appearing here, but things were slow to change after the war and there may have been stocks of the earlier model to shift first.
I think the 24v version was fairly late here so it is unlikely that you would have received them as standard, I can't imagine Lucas making 24v for export if they were using 12v here.
One thing does seem possible is that the geared unit also used the 12v dynamo but the fields may have been rewound in Australia to suit the 32v. The 12v armature would have produced 32v with the gearbox.
Flux