A well tool can include a flow path, and a flow blocking device which selectively prevents flow through the flow path. The first door has a first door cowl. At least one of the first and second support structures includes a planar base, a movable stage that can be moved over the planar base, and an actuator for moving the stage. Morphology of the first surface is modified to tailor the interlayer exchange coupling. After the sheet has an image transferred thereon from the belt, sometimes the sheet adheres to the belt, which can be disruptive to the system. The manual bypass sheet is guided by the manual bypass guide member toward the nip portion and is sent out by the feed roller to a sheet transport path.