a given pin the appropriate rack could be chosen so if a key had a cut depth of 60 mils a rack b could be selected and used for the corresponding pin 0093 fig4 is a flow chart of an exemplary embodiment of keying method 430 of the present invention at activity 432 the rack carrier can be pushed away from the pins such that it moves from a u201c normal u201d position to a u201c dislocated u201d position this can be accomplished by inserting a carrier relocation tool such as a paperclip into a carrier relocation tool aperture found in a front face of the plug such that the tool engages and pushes the carrier backward with the carrier dislocated a keying tool and or rack alignment tool such as that shown in fig4 can be inserted into apertures in the cylinder body because the keying tool can retain the carrier in the dislocated position the carrier relocation tool can now be removed the insertion depth of the keying tool can be limited by the geometry of the keying tool such as a shape of the base of the keying tool or a prong length and or the geometry of the cylinder body and or plug assembly for example if the cylinder body has a elongated circular exterior an interior and or contact surface of the base of the keying tool can be shaped as an elongated annular segment the inner radius of that segment approximately matching an outer radius of the cylinder body.