Well, here's more index to ring finger work-out. This is an exercise developed as a variation of another "classic": stepwise ascending/descending in diatonic fourths through a major scale. This means that not all of them will be perfect fourths. From F to B you get an augmented fourth (tritone), which could be a clue for you to develop another exercise: try ascending and descending in perfect fourths... and let's see what happens. Take that as homework. Again here you get to practice 2 fingering patterns: M-R-I ascending and after the B(M) C(R) B(M) turnaround I-R-M descending Ok, hope this is useful. Any comments are welcome.