Shelf block improvement

My improvements are: 1. The recipe now requires 2 stripped log and one item frame. 2. The position are by follow: Stripped log, item frame, stripped log. This will create the current shelf block. 3. But if you double it, it creates a double row shelf block.(and vice versa if you triple it, but i feel like it would be aesthetically pleasing if the limit is only two) That's my Idea for improving the helf block.