Just returned from a 2500 mile trip, the doghouse on mine only felt hot after climbing some steep grades. I have two floor mats on each side from previous owner and my feet are fine, I wear moccasins when driving usually. When stopping I haven't noticed the heat issue you speak of but mine doesn't have the overhead bunk but the entertainment center. I always let the engine run for a minute or two before shutting it down, the fan seems to blow a lot away i guess. I would be interested in the air dam, I have a carbon fiber guy that owes me a favor......