For example, the outer core mold 16, FIG 6, may be cast to have {HEAD ~ a series} of locator pin supports 18, of a specified depth and of a diameter slightly larger than the locator pin diameter, for aligning and centering the inner core within {TAIL ~ the mold} 
For example , the outer core mold 16 , FIG 6 , may be cast to have { HEAD ~ a series } of locator pin supports 18 , of a specified depth and of a diameter slightly larger than the locator pin diameter , for aligning and centering the inner core within { TAIL ~ the mold }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL