Before revision:  We give an  algorithm that decides whether a given polyhedron with n facets is castable with a single-part mold , and if so indicates how to orient the polyhedron in the mold and a direction in which the product can be pulled out without breaking the mold.
After revision:  We give an O(n)-time algorithm that decides whether a given polyhedron with n facets is castable with a single-part mold , and if so indicates how to orient the polyhedron in the mold and a direction in which the product can be pulled out without breaking the mold.