The vise is together and damn it is slick. Give the Johnson bar a push either left or right and the screw spins until it runs out of energy or the chop runs into something. Then give the bar a little encouragement and whatever is between the chop and the face is held rock solid. Pretty damn impressive.
I still have to shape and fit the backing board to the bench and shape the chop but the vise is made and it is onto installing the slab.