In a preferred embodiment, FIG 7, four locator pin supports 18 are spaced 90° apart from each other, starting at 45° from the center vent hole of {TAIL ~ the three vent} holes 17, and are partially formed in each half of {HEAD ~ the outer core mold} 
In a preferred embodiment , FIG 7 , four locator pin supports 18 are spaced 90 ° apart from each other , starting at 45 ° from the center vent hole of { TAIL ~ the three vent } holes 17 , and are partially formed in each half of { HEAD ~ the outer core mold }
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 OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD