Since I started casting in 1972 and as instructed by lyman when I purchased my first mold . . . a 358156 I have always used a thick dowel to rap on the sprue plate and the hinge pin. Every once in a while I have to replace one due to it turning to splinters. Made this one on my wood lathe the other night.
If someone else had of done to me what I did to myself . . . I'd have killed him. Humility is an asset. Heh - heh.