{TAIL ~ A clamping actuator} 646 is connected between {HEAD ~ the horizontal cross beam tube} 602 and the outwardly disposed clamping arm 642 as best shown in FIGS 1 and 7 by use of pins and clips as well known in the art 
{ TAIL ~ A clamping actuator } 646 is connected between { HEAD ~ the horizontal cross beam tube } 602 and the outwardly disposed clamping arm 642 as best shown in FIGS 1 and 7 by use of pins and clips as well known in the art
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH