Ian,
Did I mention that, ultimately, it'd be 'handy' if REAPER queried the device and loaded the corresponding map automatically?
It'd be handy just to have one 'map' that included all of the currently-available maps... All this stuff already causes loads of user-confusion so the above seems a possible improvement...
Deric.
Ps. Other-DAW devs... think you're a bit behind the curve chaps... best get busy eh?