D3 8-inch Stone Wall with Portcullis Insert vertical end posts into the base plate. Insert wall segments as shown above. (You can rotate and rearrange these segments if you are assembling multiple walls) Glue asymmetrical corner pieces into the 4 slots closest to the center. Glue wide corner strips into the 4 slots closer to the ends of the base plate. Glue the top plate down to the op of the vertical wall segments. Glue portcullis into the removable top plate. Insert but DO NOT GLUE the portcullis into the top slot of the wall. This is removable for game-play.