Thank you, Carl and Christopher.

I learn best when I understand the foundational structure underlying practical applications -- I'm always the student pestering with "why why why"... I did study music theory years ago in college but I'm very rusty... I don't think GT has a music theory track per se, though I know it's woven into the lessons. Is there a place either of you might recommend if I wanted to more seriously study theory? (I think that will help with songwriting as well)