11C is a top view of the floating washer shown in FIG. 11A; FIG. 12A is a perspective view of one embodiment of a connecting plate; FIG. 12B is a top view of the connecting plate shown in FIG. 12A; FIG. 12C is a side view of the connecting plate shown in FIG. 12A; FIG. 13A is a perspective view of another embodiment of a connecting plate; FIG. 13B is a top view of the connecting plate shown in FI