You were right on about what to do with those pressures and your technique deserves due credit.
Your right in South Florida traffic it might do well to change the drive pulley ratio on the compressor to spin it at idle at the same rate as it would normally be at 2000. Since all you ever get to do is idle.
Unfortunately so many people are leaving S. Florida and coming this way. Gainesville's sprawl is starting to crawl just like down south.
Bosch Master, ASE Master, L1
33 years MB technician