[midnight911]

this time, i didn't incorporate Grady's advice. So, the tube is not connected to the flapper box. It's just facing forward so that the air flows into the tube and to the rear half of the rotor. If the car is rolling forward, i do not think the fume from the brake goes forward thru the tube.

i still think keeping the hot air from stuck in the pocket is a very good idea. to do that, i could just replace the tube I have out the heat exchanger with a u-shaped tube and vent the hot air rearward...