The legs 124 a,124 b define respective aligned apertures 125 a,125 b, and first and second ends 126 a,126 b of a spool 126 are rotatably supported respectively in these apertures, and {HEAD ~ the spool} extends between and through {TAIL ~ the legs} 124 a,124 b 
extends between
The legs 124 a,124 b define respective aligned apertures 125 a,125 b , and first and second ends 126 a,126 b of a spool 126 are rotatably supported respectively in these apertures , and { HEAD ~ the spool } extends between and through { TAIL ~ the legs } 124 a,124 b
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 HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH