So as promised, here are a couple of pictures of the electronics. The X-Keys unit is in the upper left. You can see the stamp at the bottom and the servo controller is right above the stamp. I also have an old power supply that I am using for the servo controller and I will also use that to power the 12 volt lights on the cab stand. If you want a more detailed description on how this all works together, go to this page. It details the entire build process of a steam locomotive simulator.