Originally Posted by EarlyMon
Not exactly less than a millimeter difference, now is it?
I'm touched that you spent so much time on this.
Note that the picture is at a slight angle. You can see this by looking at the top edges - they are at an angle. I had my iPhone in one hand and an A1 piece of 5mm plastic sheet balanced on my back to shield me from the lights in the ceiling when I quickly took this photo to help one of your forum members.
So you would need to do it with a trapezoid, not a rectangle.