Convertible Wind Deflectors

[Patfallon]

I to have thought about a deflector in the past (three in the morning on the M3) and never got around to it. But I just had an idea I'm wondering how difficult it would be to re-route the defunct rear heater outlets, through the seat backs, and out at the headrests. If anyone has done this already I would be interested. Otherwise I will look into it when I get some time.