How difficult is it to re-seat the Vision sensors in the body after cleaning?
It is not difficult at all, because it is automatic. Both the Vision emitter and detector sit in pockets within the eye cover, held in place by a pair of brackets. As the eye cover is opened, they swing out with it, exposing the optical surface for cleaning, and the Vision beam path in the body. When the Vision eye cover is closed, they are perfectly re-aligned to the body.