A soldered assembly for a microelectronic element includes a microelectronic element, solder columns extending from a surface of the microelectronic element and terminals connected to distal ends of the columns. The surgical component positioner includes a body, a component link adjustably mounted to the body with multiple degrees of freedom relative to the body; and an adjustable locking mechanism operably connected to the component link. For example, in an embodiment involving two displays, each of which display a video feed, the video is displayed such that the video feed of the most appropriate scene is shown on that display.