To ensure that all the pieces are identical, we will align, clamp, and then sand them all at once. We used bar clamps and them put the entire stack in a vise. When repositioning the stack in the vise make sure that at least one clamp remains engaged to maintain the proper alignment. See the image on the right. While you are sanding, make sure that you are staying square to the sanding surface. We worked our way through finer and finer grits of sandpaper to complete all of the requisite edge sanding because it is much more efficient at this stage.