f FIG. 7(a), [0023]FIG. 7(f) is an enlarged perspective view of a component used in the head shown in FIG. 7(a), [0024]FIG. 7(g) is a side view of the component of FIG. 7(f), and [0025]FIG. 7(h) is an end view of the component of FIG. 7(f); [0026]FIG. 8 is a schematic block diagram of the electrical control circuit for the flexible head; [0027]FIG. 9 is a schematic block diagram of a controlled ci