I decided to drop the A?C since I never use it. The weight savings of everything removed was about 100lbs. I made a box with electric motor and servos to control several things.
I have a circuit driving a mixing solution slightly different then conventional controls. For instance I can control the vent and floor in any mix combination. The Defog is completely separate. The fresh air or recirc is completely mixable.
I made a P2 T2 valve for the cooling tubes so no pump is needed. I use an electric valve to turn on the heat. No I don't recommend someone going through all of this but it is an example:
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