So my aftermarket tray kept getting stuck. Because of the arm rest design and lock its not easy to hold the tray up at the front. This hyper simple rectangle supports the tray. It has a 1mm tongue, which won't wedge to hold it in place.
Because of the arm rest hole design it will happily sit there before adding or removing the tray. You don't need to tape or glue it.
The author marked this model as their own original creation.