A system for use with a solid ink delivery system of a phase change ink imaging device comprises an insertion opening configured to enable insertion of ink sticks therethrough and into the ink delivery system. An insertion key is movably supported adjacent the insertion opening such that a portion of the insertion key protrudes into the insertion opening. The portion of the insertion key has a shape that is complementary to a key contour on a first ink stick and a second ink stick. A key positioner is operably coupled to the insertion key to move the insertion key between at least two different predetermined positions on the perimeter of the insertion opening. The predetermined positions include a first position that is complementary to a position of the key contour of the first ink stick and a second position that is complementary to a position of the key contour of the second ink stick.