The stylus and cutter are positioned on {HEAD ~ first and second guides} which are connected by {TAIL ~ a tie bar} 
The stylus and cutter are positioned on { HEAD ~ first and second guides } which are connected by { TAIL ~ a tie bar }
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL