If you want to pick your brain, ultra-analyzing a scale: finding symmetries, asymmetries, reciprocals, common tones with common fingers, upside down, inside-out relationships between the hands, and anything else that will solidify it, you might add an extra few senility-proof years to your life. Example: I can’t remember my neighbor’s first name, or my best friend in high school, but I can dissect all scales in the Circle of Fifths (Major and minor), taking them apart piece-by-piece and putting them back together in the holistic sense, guaranteeing their well-being in brisk tempo.
As an example, I offer my latest dissection of Ab Major, bestowed by a generous donor from the piano student population, whose interest in advancing micro-exams of scales produced a mega-analysis beyond his wildest dreams. And in this essential post-mortem, after the scale was D.O.A. (dead on arrival), I posted a homework assignment for the catastrophe-prone pupil: Chart the 4-octave spree based on all the nit-picky relationships fleshed out in the attached video.
Once completed, he will diligently practice the scale, enlisting faith and determination, combining all the brain/brawn power necessary to resurrect it.
Basic fingering, two octaves: (4 flats: Bb, Eb, Ab, Db)