too lean ?

MS (from V2) is 'self tuning' if your a registered owner of tuner studio. IIRC it can plot fuel curves on your driving habits but I dont know how it data logs because that is only in MS3? Speeduino uses tunerstudio also and claims to be able to self tune, so its more of a TunerStudio feature. My Pro-Flow 1 is NOT self tuning as you had to provide Edelbrock your engine parameters so they could burn you a chip, then you had very limited adjustment range (+-10%?) on certain variables like fuel curve. Pro-flow 2 wrote its own 'chip' on the fly with its programming. I think all modern stand alones now have way more adjustablility than the early ones. Even Ford EEC-IV sort of tuned itself with its Mass air design.