Guys,
Just wanted to put out a recommendation for John Block's "Auto-Ware" online webinar's. I've just completed the 5-week "Pi" course, and can say that John does a great job of teaching through a combination of theory and real-world data.
Between us we quickly established what I knew and didn't know, and John concentrated on bringing me up to speed on the subtleties and anomalies of Pi vs the other systems I was more familiar with. More importantly, he identified a large number of very useful combinations of data that quickly reveal how the car and driver are behaving.
All in all, the 5 online hours probably saved me 50 hours of trial and error, and to me that's worth way more than the measly $125 it cost. Well worth your time.....