Now that you are done with all of the drilling, routing and cutting congratulate yourself and take a deep breath because all of the dangerous stuff is over! Grab all of your pieces and some wood glue. Begin marrying the 4" squares with the back of the 5" squares. Make sure the cross is centered on the front. Repeat six times until you have six complete sides. At this point I ran the combined pieces through the table saw to make sure the chamfer matched up perfectly.