I don't know about brassard, but chett removes the folicles so you really dont need to do electo, he also said something to me that it also shrinks the scrotal tissue. He recomend only electro on the perinium. and said that electro can be done after surgery if desired.
I would prob email brassard with the question for better understanding, but IMO penile inversion may bethe way it was used to be done but there are better ways/results using the non-inversion technique.