Circuit Bending is it's self the art of exploring a circuit board to find new pathways that will generate an altered form from the original designers intended function. Sometimes one is simply adding additional functionality, other times skewing the form.
Circuit Bending is not "modding" it is not something one does with schematics or circuit maps to tell you what to do.
Why this is so confusing is beyond me. Reed Ghazala created these parameters for the art form he named and crusaded for. His name, his concept, his rules.
So many people are "teaching" this art form, selling instruments that they have Bent and making money off of one man's idea yet they can't see to respect the little bit of philosophy behind what the intention of his work was in the first place.