{TAIL ~ Rearward adjustment plate segment} 10 is joined along a forward edge to the rearward edge of {HEAD ~ forward adjustment plate segment} 12, forming a substantially right angle 
{ TAIL ~ Rearward adjustment plate segment } 10 is joined along a forward edge to the rearward edge of { HEAD ~ forward adjustment plate segment } 12 , forming a substantially right angle
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH