I wanted to add that this technique would work well on the check book covers too. When you make the pockets that hold the checkbook and register, just make outside a bit shorter and the lining a bit longer* and that would make the little trim on the edge and easier to find where to insert each part. :-) * I would think that trimming off 1/2 inch on outside part and adding 1/2 inch to lining would do it.