In addition, as was the case in connection with the embodiment of the invention illustrated in FIGS 1 3, the pair of {HEAD ~ arms} 86 and 88 are configured in a complimentary manner so that when mounted within the ring structure, as best shown in FIG 6, the straight sections 102 and 104 are disposed towards opposite external surfaces of {TAIL ~ the ring structure} 
In addition , as was the case in connection with the embodiment of the invention illustrated in FIGS 1 3 , the pair of { HEAD ~ arms } 86 and 88 are configured in a complimentary manner so that when mounted within the ring structure , as best shown in FIG 6 , the straight sections 102 and 104 are disposed towards opposite external surfaces of { TAIL ~ the ring structure }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL