Anybody have any experience with HP Tuners on the E80A ECM?

Particularly in zero'ing out tables:

ECM 12678
ECM 12715
ECM 12634
ECM 12635
ECM 12716
ECM 12717
ECM 12684
ECM 12713
ECM 12718
ECM 12661
ECM 12663

They are all under spark tab; under fuel, humidity, VCT and MBT corrections.

Supposedly after this modification you will get the exact timing from high octane table.

I am just trying to figure out where the ECM is pulling and adding timing...