That's great stuff Paul !
Looks like the radios were in the same location as in the 'J' model, more or less, and allowing for the waist windows of the late 'D' model, although the later 'J's at least, had radios moved to the entrance well, beside the top turret
I had some vague info about the radios being in a similar location, in the forward section, behind the flight deck, on RAF aircraft, although no definite proof or pics, and wondered if British equipment had been fitted.
Having done a bit more digging, it looks like it's very possible that American equipment was retained, although perhaps adapted as needed, as it was in 2 Group Mosquitos, and descriptions of RAF crew positions and duties seem to bear this out at least partially.
Allowing for the amount of detail that will be seen (or not, as the case might be), I think I'll go with that arrangement for the model.