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 {TAIL ~ the axis} of {HEAD ~ rotation} of the pivot 
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 { TAIL ~ the axis } of { HEAD ~ rotation } of 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 TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH