my question: why have the movable brush on 31 gen. when we have regulator on unit to control output. what is max output, and min. output if no third brush? my generator is all apert ,the guy i got it from had case,end plates chromed,nice. i see from leading parts houses cat. drawing that exploded view shows how it goes together... new armature was in box too. rewrapped fields and going to put in service sometime on my 31.....thanks for input.....kev
