Abstract: An apparatus for positioning a workpiece in a working orientation with respect to a portable operating device when the apparatus is in an assembled orientation, the operating device cooperating with the apparatus to apply at least one operating element to the workpiece at least one predetermined work site when the workpiece is in the working orientation, includes: (a) a base unit configured for effecting a first cooperative fitting with the operating device in a first orientation; (b) a receiving unit configured for effecting a second cooperative fitting with the workpiece in a second orientation; and (c) an orienting structure configured for effecting a third cooperative fitting the receiving unit with the base unit to situate the apparatus in the assembled orientation.