In a preferred embodiment of the invention, {HEAD ~ the mold cavity} 404 is formed by {TAIL ~ a bottom mold} 406, a bottom riser block 408, and a cull block 410 
is formed by
In a preferred embodiment of the invention , { HEAD ~ the mold cavity } 404 is formed by { TAIL ~ a bottom mold } 406 , a bottom riser block 408 , and a cull block 410
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH