Almost everything I've seen about CAGED is retrofits. CAGED is chord based. By definition it's only 3 notes (some repeated). Scales start from 5 and go up to 7 notes. It's a whole "draw the rest of the fucking owl" situation. Might as well learn what a scale is and consruct the arpeggios, triads, chords with guitar at hand. That's a much better learning experience.