I know what your saying but the top part could have a bend also to close that opening so only the bottom would have an opening and it would hardly be seen. I really think you should try making a door with a little offset in the front of that 1/4" just a simple L bend in a piece of nice alloy would work really nice as a door. I was looking at mine back when Technault did his and was thinking about doing this. If you have a brake and can bend metal this would be a simple thing to do with a piece of metal, it would not only work but look good too, its up to you of course, just something I was thinking about a while back