Well, they put me back on the two-speed idle again! I'm happy! It is stressful watching someone else drive your VX on the rollers...

Test 2500RPM / IDLE
HC PPM 8.8 / 3.8 (limit 220.0)
CO% 0.03 / 0.04 (limit 1.2)
CO2% 15.5023 / 15.4109
RPM 2401 / 803 (limit 1350)