In a preferred form of the invention, the system includes a means for adjusting {HEAD ~ the tension} of {TAIL ~ the cable} 
of
In a preferred form of the invention , the system includes a means for adjusting { HEAD ~ the tension } of { TAIL ~ the cable }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL