The present invention makes it possible to fix connector pins at low cost. The method includes the steps of providing the casting having a core material disposed in the internal passage; providing the decoring apparatus configured to selectively oscillate the casting and selectively rotate the casting; securing the casting in the decoring apparatus; introducing a quantity of shot into the internal passage of the casting; oscillating the casting; and rotating the casting. In some examples, data falling outside a threshold contour of historical data density may represent a new or an abnormal situation, and such data andor a contour plot having such data may be highlighted in a graphical display. The alkali treated peanut heart material is neutralized with an acidic aqueous solution. The joint assembly connects with the table adapter about a shaft such that the joint assembly is rotatably adjustable. A locking hole is defined beside the restraining hole.