A magnetic tape is packed prior to removal from a tape drive. The slider members are vertically adjustable within the channels and may include hinge mechanism such that either door jamb assembly can hingedly support a door member therefrom. The method also includes writing data to said log plex and said first plex. The ball lens and the constraining insert are disposed within the cavity. The invention includes centering means so that the needles will be situated in a pattern surrounding the outside of the ostium of a vein.