Again, {HEAD ~ each secondary array} may comprise {TAIL ~ similar width cutters} at the same radial distance from the bit axis, or cutters at different radial distances from the tool axis 
Again , { HEAD ~ each secondary array } may comprise { TAIL ~ similar width cutters } at the same radial distance from the bit axis , or cutters at different radial distances from the tool axis
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH