Posted for "George Braly" <gwbraly@gami.com>:

 Chris,
 
 It is a beautiful installation.  And clearly,  if cooling is the only
 consideration,  something like you have done is the optimal way to do
 that.
 
 A couple of thoughts?   Have you ever put a thermocouple under the cowl
 after shut down to see what the temperature goes up to on a hot day in
 still air, after about 15 to 20 minutes?   I am thinking about things
 like wiring and ignition harness temperatures.
 
 On a Lycoming, with the mags on the back of the accessory case,  that is
 probably less of an issue, but on a TCM engine,  the mags would be heat
 soaked to an unusually high level, I think.
 
 Regards,  George