The range of movement thus being represented by {HEAD ~ the spacing} between the top of the collar 68 and {TAIL ~ the bottom} of the eyebolt 54 
between
The range of movement thus being represented by { HEAD ~ the spacing } between the top of the collar 68 and { TAIL ~ the bottom } of the eyebolt 54
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH