IMPROVED A/C & HEATING SYSTEM
Revised in post #1 (highlighted in blue with photo's 6 - 8) to include simple modifications to drastically reduce the engine cooling system heat soak, which reduces vent temperatures by an impressive 8'F.
I purchased a roll of Frost King (12"w x 1/8" thick x 15' long) self adhesive foil & foam from Lowes. So far all I have done are the Heat Soak mods parts 1) and 2) (photos 6, 7, & 8). The interior of the car remained noticeably cooler on a recent 80 degree day trip. Normally the Elise is a warm ride even in cooler weather.
Today the outside temp was a humid 86. It was the first time the car was too cold while running the A/C.
This is an excellent mod!