spirit and scope of the present invention and may be easily varied as needed to accommodate demand the conventional s tiles will be manually or automatically de palleted from the mold as is presently done in the art in order to u201c switch over u201d to two piece mission type tiles under one version of the invention the line is stopped and the slipper configuration is changed reference is now made to fig3 a which is a pictorial view of a modified slipper design 30 which includes a scoring blade 39 which is configured to form the channel 9 during the forming process in one configuration the scoring blade is 5 32 inches high 3 16 inches wide and 1 5 inches in length although other configurations are contemplated without departing from the spirit and scope of the present invention fig3 b shows various possible scoring blade configurations 39 a 39 b 39 c as noted above under the first embodiment of the invention in order to use the slipper configuration in fig3 the line has to be stopped and the slippers exchanged however an alternative invention includes the concept of configuring the slipper to allow the blade 39 to be moved up and down such that it scores as desired in one position but presents a flat surface flush with.