I converted my small inner loop from the DC power pack it came with to AC power, had some issues with the CCA wire I purchased by mistake (Help with Wiring Issue, is CCA wire the issue? | O Gauge Railroading On Line Forum (ogaugerr.com)).
Then I wired up the accessories on the new expansion my sons and I are adding, still have to add in a few LEDs in some of the buildings. We are trying to build a small race track, not to scale, so my next project is to try to build some small stands for it since I couldn't find any to buy. I also mounted a background behind the layout on the wall. I still how to install the woodland scenics fence I purchased, just have it placed on the layout around the airport for now.