and allowing the corresponding fiducial feature to pivot within the circular fiducial feature 1005B. As a result, two fiducial features of a lid piece can be received by the fiducial features 1005A and 1005B and a lens, or other component, located on a lid piece can be pivoted within the fiducial feature 1005B and moved within fiducial feature 1005A as indicated by arrows 1028.