These pins are positioned 90° apart on an imaginary plane through {HEAD ~ the equator} of {TAIL ~ the inner core} 
of
These pins are positioned 90 ° apart on an imaginary plane through { HEAD ~ the equator } of { TAIL ~ the inner core }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL