This past weekend I did most of the wiring under the layout. I still have a few more connections to solder but I was able to run a train this week! I got the main line powered up but I still need to wire up the control panel for the sidings. I plan to have three different blocks (each of the passing sidings, and the sidings up at the top) that can be turned off so that I can park engines there and operate more than one train on the layout.