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