Hi Chuckadeemus, I have a R500D which are know for their heat soak issues and have been battling with it for years now. Not wanting to change the external appearance of my car with ducting for air into the footwell, or add grills in the side panels to let the hot air in the engine bay out (which i agree would be the most efficient solution), i have updated my car with the following: Heat shield on footwell Zircotech Primaries Fix to heater cable Thundersport Transmission Tunnel Heat InsulationIf i am honest the biggest changes came from fixing the heater cable which was always slighly on, and the Thundersport side panels, both of which where really cost effective! Perhaps this would therefore be a good starting point?