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