I had a burst of motivation late summer to complete ALL my trackwork which includes the three staging extensions. One extension is located on the Rock Island end of the layout. This staging will be where a train is made up at the beginning of an operating session, and obviously where it will terminate as it leaves the branch. The other two extensions include one at the start of the Eagle Sub. just past the Milan depot. This staging will accept cars for the lumber dealer and food distributor. Finally, on the Andalusia Sub. the third extension will take cars bound for a chemical dealer, landscaping company, box factory, and major steel manufacturer. The steel company has a runaround, so I needed to incorporate a runaround on that extension for the engine to face forward for the return trip. Below are some photos…

Two of the staging extensions are stored at the entrance to the layout room on the Rock Island side. The extension on the left is the Andalusia Sub. staging, while the right one is the Rock Island extension.
This is the Eagle Sub. staging which is permanently affixed to the layout fascia.
I used three retractable brackets for each extension. This one is for the Eagle Sub. There’s a release on the end of the bracket, so it’s easy to fold back with the spring-loaded feature.
I decided to use Atlas code 100 flex track and turnouts because of its bullet-proof reputation. Because I use Micro Engineering code 70 on the layout, I fabricated the set up you see here to align the rails for a smooth transition between the sections. The Eagle Sub. extension is hardwired to the layout, while the other two extensions use audio plugs to power the rails.
Finally, I found a neat 2-piece picture hanger connector at my local Menards that works great to friction fit the two separate extensions when in use. I simply drop the staging into place, press down slightly and align the track, and plug in the audio jack for power. Done!