As can be seen in FIGS 1 and 2, close to the upper portion of the pivot 19 is a cylindrical section 25 off centre with respect to the axis of {HEAD ~ rotation} of {TAIL ~ the pivot} 
of
As can be seen in FIGS 1 and 2 , close to the upper portion of the pivot 19 is a cylindrical section 25 off centre with respect to the axis of { HEAD ~ rotation } of { TAIL ~ the pivot }
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 REL TAIL TAIL TAIL TAIL TAIL TAIL