A method and computer device for determining consumer preference level automatically. The inner lead portions define an open area having a central region and the dam bar defines a leadframe outer perimeter. In addition, recesses which are joined to the gate portion and the ejector pin in a molding process are formed in the concave surfaces. The tissue-retracting blades are also movable, together as a blade assembly in a selected blade spatial relationship, when a second actuation input is applied to a second actuator to articulate a pivoting wrist joint configured in the retractor housing.