102 may extend slot 104 may be an opening in an enclosure e g a shell a frame a housing a case etc designed to contain combiner 102 or may exist in a separate component a combiner positioning system may be used to transport combiner 102 between a display position and a stowed position referring generally to fig2 a fig 8 combiner positioning system 200 may move combiner 102 between the stowed position and the display position and rigidly hold combiner 102 in the display position thereby reducing or eliminating the potential for vibration combiner positioning system 200 may use one or more camwheels in conjunction with one or more slots or pins to drive a carrier supporting combiner 102 between the stowed position and the display position the camwheel s may be kinematically linked to a locking element an angle adjustment support and or a flap advantageously all components necessary to transport the combiner between the stowed position and the display position may be operated by the rotation of one or more axially linked camwheels referring now to fig2 a and fig2 b a combiner positioning system 200 is shown according to an exemplary embodiment fig2 a shows combiner positioning system 200 in a display position whereas fig2 b shows combiner positioning system 200 in a stowed position referring specifically to fig2 a combiner positioning system 200 may include a carrier 204 for supporting combiner 102 an axle 206 extending from carrier 204 about which carrier 204 and combiner 102 may rotate when in the display position and a housing 220 for supporting and or containing other components of system 200 still referring to fig2 a combiner positioning system 200 is shown in a display position combiner positioning system 200 may include a carrier 204 carrier 204 may be.