I think you should ask Lisa directly in her sub forum. Go to the main page and scroll down to the full access area and you will see all the instructors areas. [br]Also, if you haven't done so take a look at her fingerpicking course. It will explain everything you asked. It's very comprehensive and in my opinion should stand on its own as a separate style course or at least be easier for folks to find, but if you go to her directory of tutorials you'll find it there. Each lesson builds on the previous so start at the beginning and work through it. At some point she does talk about and demonstrate the difference in picking styles using the ring finger or not, but it's all still under the umbrella of the"Travis" method which involves using the thumb for picking alternate base notes. It's not always gonna be on strings 6,5&4. If the chord has the it's root note on the fifth like C maj or A min for instance then it's alternate note would be on the third string. That's why Caren did it that way. There are many topics on this in the forum that might explain it better than I can or like I said just ask Lisa directly and I'm pretty sure she can clear it up for you.

Hope that helps,

Moe