In {HEAD ~ one position}, the motor circuit uses only the poles 47a, {TAIL ~ 47c} 
In { HEAD ~ one position } , the motor circuit uses only the poles 47a , { TAIL ~ 47c }
OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL