Up to this point, we’ve seen the top racks and the drive mechanisms installed in the side aprons. The final pieces to address are the lower racks. While the tabletop attaches to and rides on the top racks, the lower racks mount and support the main box. Like the upper racks, the lower racks engage the drive mechanisms and span not only the apron, but also both legs. So, we need to be careful about their alignment. An additional complication is that the rear end of the lower guide is blind mortised into the rear leg, while the front end is grooved. The main box is supposed to be removed through this groove for assembly and maintenance. To hide them, the grooves get covered with dovetailed keys veneered to match the rest of the carcass, then covered with guilt bronze mounts. No one will ever know…