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