Preferably, {TAIL ~ the inner core} has {HEAD ~ four integrally formed locator pins} extending radially outwardly therefrom 
Preferably , { TAIL ~ the inner core } has { HEAD ~ four integrally formed locator pins } extending radially outwardly therefrom
OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH