OK, this thread is finally coming to a close. Results:

1. First air pot was dead as a door nail
2. Vendor sent second air pot without hassle or return
3. Second one works adjustments are just ultra sensitive
4. Original air pot was worn through to shiny metal around idle
5. No more engine codes

I'm getting readings from 0.6 - 0.8v. Don't know if that's normal but that's what I've got.

Still have a hunting idle on warm start up. I tapped the IAC with a screwdriver and heard it click. Idle seemed to smooth out. So on to the next thread!