Rich Idle AFR reading

I am probably not the best in interpreting any A/F device, but I would never use any device to adjust idle. Idle adjustments are too personal, too unique to each motor. Idle speed, fuel mixture are a somewhat delicate balance that an old pro can "hear" if it is right. Idle speed is determined by the lowest comfortable speed not allowing the motor to die. Mixture is a balance from side to side (2 corner) and sometimes front to back (4 corner idle). It usually is the leanest that an engine will consistently idle at, and I usually go a little richer from there. I don't care about vacuum readings, that will take care of itself,. It is always more important that the motor is happy. I think that all the numbers you provide are fine. Be careful how you interpret them. A/F can go lean off idle if you are moving the throttle slowly. The carb is transitioning from one circuit to another. Under normal use you would hit the throttle harder engaging the accelerator pump which compensates for this dead spot. Hope this helps to begin the discussion.