of offset to either side of the neutral balance center position b at the top end of attachment hook 200 a cross sectional view of its immovably affixed receiver tube 155 a is shown within this receiver tube the inner adjustable insert tube 155 is shown the lifting eye 157 with its single hole for attachment to a suitable lifting device is shown this upper assembly provides four inches of offset to either side of the neutral midpoint in one inch increments perpendicular to the plane of plates 210 210 a this arrangement provides the ability to tip the suspended tool track combination to either side again for the purpose of accommodating variations in grade or some other perceived advantage of manipulation fig1 offers views like fig7 and fig8 combined except that dimensions represented reflect the larger diameter of the rear forcing disc 110 b fig1 illustrates detailed dimensions of the flange plates used to join forcing discs 110 a 110 b to their respective separator assemblies 120 a 120 b for the forcing discs the ten inch edges of each flange plate are welded to the ends of the ten inch wide forcing disc bands fig1 specifies dimensions of attachment hook.