This is my original Arduino-Plex: Plexiglas Arduino work surface
. It still works great, but now it has been completely taken over by a project that continues to grow. I realized after everything was stuck and glued in place that it would have been more helpful to be able to move things around. I would have liked to move the Arduino mounts to add more breadboard space and even remove the bus-bars between the breadboards that probably didn't belong there in the first place.
I needed a way to shift work to something new, without completely destroying the previous project. I also built this board when I only had 2 Arduinos, and now I will be ordering a 5th board shortly. Clearly, I needed to build a new board.