Quilt Wall Hanging Frame

My wife made a quilted artwork piece several years ago but we had no easy way to display it. Picture frames can be used but it is difficult to properly stretch a quilt inside a frame and most of them are quite ugly. So my wife challenged me to design a 3D printed frame that would enhance her quilt and would be simple to make. I also had the requirement that it had to fit on my 6 inch square 3D print table.

So I designed a rounded outer frame that is exactly 6 inches tall and slightly les