The way the present invention is used to control {HEAD ~ the media position} along {TAIL ~ the longitudinal direction} is best understood with reference to FIG 4 
along
The way the present invention is used to control { HEAD ~ the media position } along { TAIL ~ the longitudinal direction } is best understood with reference to FIG 4
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH