all the details of the pattern. secure the top in place.
flip the molding board over. carefully remove the bottom of the molding board. next, remove the runner and patterns, being careful not to wiggle or disturb the pattern in the sand as you do so. spoon out a pathway in the sand between the void left by the runner and the molds. you will want to make this wide enough so that enough metal will reach all areas of the mold before the metal cools.
position a block in the second mold board in the location so that when it is flipped over the block will match up with the central 