I wanted something a little higher of the desk to sit behind my keyboard. It needed to have the space in the middle to prevent hiding the center swip up section. The original by @djavionyx is a great design but I needed a little more tilt back, increasing it from around 95 to 115 degrees. I also added more support in the sides as there was a little bit of flex in the first version when you touched the screen. I needed it for the iPad 13" AIR and the support has worked very well.