Was able to answer my own questions finally this weekend:
1) Yes, this is actually quite trivial to do. If you can run the mic to the top of the A-pillar, you can put it in the map light. The map light comes off with two screws and there's a big gap along the top of the headliner you can tuck...
I have the sport 6MT, so am stuck with the orange-led base audio till I upgrade. Two question topics:
1) has anyone tried running an aftermarket BT mic all the way up to the map light? I assume that's where the factory one would go. I don't really like the idea of an exposed one in the...