I tune with Maestro
. Hope to make the jump soon to something a little less restrictive.
Anyways, you've got most of the process correct. Ideally, drive around for a few days with the Main Fuel Correction and injection correction all set to 1.0001, then review your block 32 values and adjust your injector constant (KRKTE) and battery voltage compensation (TVUB) to bring them really close to 0
If setup correctly, you should not have to make adjustments to either the main fuel correction or the injection correction map around idle.
If you hit a brick wall, let me know I will give you hand.