In Lesson 5, Mircea returns with one more excerpt from Torroba's Sonatina to show how refinements to your thumb, wrist, and elbow position will help you stretch and maintain a flexible and stable left-hand, combined with all the techniques you've already learned.
Mircea concludes by driving home an important truth: your hands aren't too small for even the most intimidating stretches. Rather, the left-hand skill you've been learning in this course will enable you to play those challenging passages, every time.