I just got my ac system back up and running yesterday, and I had an interesting idea. When the ac wasn't working, the worst part of the car was the seatback. I always had a big wet sweat ring on my back from long drives. On my camry there's a vent on both the driver and passenger side floor under the front seats to blow on the feet of rear passengers. I'm toying with the idea of piping up from this into the crevice between the seat back and bottom of the driver's seat, or somehow piping it into the seatback itself. Some cars have air-cooled seats, though I can't think of any off the top of my head. Has anybody tried something like this? I'm looking for some different ideas/opinions