EGO correction is defined in the software. You specify the limit and step size for correction.

Regarding the base map, take a look at a few others available on Symtech's site to get an idea of the curve you can start with before going live.

I used to tune by datalogging, and running the VE analyzer to make incremental adjustments. Get TunerStudios and pay for it, the VE Analyze Live feature is pretty nice.

Read the Software manual: http://msextra.com/doc/ms1extra/MS_Extra_Software_Manual.htm#egocontrol

Read the Tuning manual as well: http://msextra.com/doc/ms1extra/MS_Extra_Tuning_Manual.htm

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2012 2500HD LML