A plurality of linkages translate movement of the stylus along {TAIL ~ its guide} to the cutter along {HEAD ~ its guide} 
A plurality of linkages translate movement of the stylus along { TAIL ~ its guide } to the cutter along { HEAD ~ its guide }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD