Positioning a work piece

A method for selectively positioning a work piece, the method comprising:

• inserting a boss of a first body into a pocket of a second body, wherein:
• the boss extends along a boss axis from a first exterior surface of the first body to a boss end surface of the boss, the boss end surface terminating the boss, and
• the pocket extends into the second body from a second exterior surface of the second body along a pocket axis, the pocket being shaped to receive the boss in a discrete number of positions when the boss axis and the pocket axis are aligned;
• and
• contacting boss perimeter surfaces of the boss with pocket perimeter surfaces of the pocket when the boss is inserted at least partially within the pocket, wherein:
• the boss perimeter surfaces define a perimeter of the boss and extend between the first exterior surface and the boss end surface, the boss perimeter surfaces defining an inner mating profile that comprises a plurality of radial lobes extending outward from the boss axis, and
• the pocket perimeter surfaces define a perimeter of the pocket and extend into the second body from the second exterior surface, the pocket perimeter surfaces defining an outer mating profile that mates with the inner mating profile defined by the boss perimeter surfaces, the outer mating profile comprising, for each radial lobe of the inner mating profile, a notch that is configured to receive the radial lobe therein.