{TAIL ~ The lettering guide} is mounted upon the planar surface for rectilinear movement along a plurality of {HEAD ~ parallel steps} 
{ TAIL ~ The lettering guide } is mounted upon the planar surface for rectilinear movement along a plurality of { HEAD ~ parallel steps }
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD