The unit also uses {HEAD ~ a unique target backing material} that does not require {TAIL ~ targets} to be made of rolls of coated or heavy material stock 
not require
The unit also uses { HEAD ~ a unique target backing material } that does not require { TAIL ~ targets } to be made of rolls of coated or heavy material stock
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH