The slab mortises are finished, I expect I'll do a little more clean up on the bottom before the bench is finished but the slab is ready to mate with the base.
The rectangular mortise is to house the top tenon on the vise backer board and the round mortises will house the base 5/8" dowels holding the slab in place.
One more mortise to chop on the long stretcher to house the bottom tenon on the vise backer board. Once that mortise is chopped the base will go back together, the vise will be fitted, and the slab installed. All that is left is the tool tray and clean up. The fat lady is clearing her throat.