you need one square of acrylic 6"x6" for the bottom. two pieces 6"x4" for two of the sides - they sit oposite each other and on top of the bottom. you need two pieces that are 6.5" x 4.5" that will attach opposite each other on the outside of the "u" shape you already assembled. make the top of them flush with the other side pieces so the bottom edge extends .25" past the bottom of the box - this prevents scrathes on the bottom during storage.

sorry, i dont have any pics