Thanks for the excellent information (even illustrated with pictures). So that's what the round coil below the fuselage is for - believe it or not but I have been trying to find that out through google for about two months (every week or two I'd go hunting). At first I thought maybe it was ordnance related, but later realized it could not be that.
I did not expect the model itself to be animated

I meant that I never realized there were directional antennas & how radio compasses work, and was surprised to find out that the Bf 110 was 'getting it' (full radio compass) while all the other fighters don't. Would be nice to be able to have it shot off or damaged, it would make navigation a bit more challenging unexpectedly. But that is unlikely as well.
One thing is unclear to me - while I understand the reason, the usefulness of being able to have the antenna turn and the way that antennas transmit differently depending on angle to source - how does the 'auto' G-2 antenna work compared to the manually turned? Do we use buttons to electrically move it, and it then automatically turns itself when the aircraft turns, or does it home in on the strongest signal, or on a selected frequency-signal? Or does it actually keep spinning around at a set rate and some kind of electronics make the radio compass point to the strongest signal in the frqeuency?