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