The stopper 50 is positioned closest to the middle section 48 of {TAIL ~ the arm} 14, {HEAD ~ the stopper plate} 52 is adjacent to the stopper 50 and the stopper pin 54 is adjacent to the stopper plate 52 
The stopper 50 is positioned closest to the middle section 48 of { TAIL ~ the arm } 14 , { HEAD ~ the stopper plate } 52 is adjacent to the stopper 50 and the stopper pin 54 is adjacent to the stopper plate 52
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH