The cutter plate 80, in {TAIL ~ the fully retracted position} shown in FIGS 1 and 3, is substantially enclosed by {HEAD ~ the support frame structure} 12 
The cutter plate 80 , in { TAIL ~ the fully retracted position } shown in FIGS 1 and 3 , is substantially enclosed by { HEAD ~ the support frame structure } 12
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH