Thanks to Sixto for the diagrams and 3 weeks of going back & forth to it, it's done. Original problem was I had air from the defroster no matter what button I pushed. All 5 diaphragms are good. I found 3 bad switch-over valves, returned the vacuum lines to their correct routing and restrictors are back where they belong. Evacuated & recharged the system late today so I'll see tomorrow how cold it gets but I finally have air from the vents. I also disassembled both control heads (previous owner gave me an extra) and resoldered them.

Next issue to tackle: The idle seems to pick up once operating temp is reached. It sounds like something switches and the idle pops up to almost 900 rpms in Park. Is there some kind of thermo-switch or can I adjust it down somehow ?

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Sharing my partner's 2012 Forte 5dr SX til I find my next 123 or 126..
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Do I miss being a service advisor ???