A system for exposing a resist layer to an image that includes a layer reflective to imaging tool radiation and a resist layer having a region of photosensitivity over the reflective layer. Each arm assembly has a first arm, a second arm, and a linking assembly coupling the first and second rotatable members to one another. The cooling fan assembly could be adjusted to a position closest to a heat source of the heat-producing apparatus by pulling the X-directional adjusting feet and the Y-directional supporting feet to different extended positions; so as to provide best cooling effect. This invention also relates to methods for producing a maize plant containing in its genetic material one or more transgenes and to the transgenic maize plants produced by those methods.