I added a trolley to the inventory. This is the first layout with the trolley. It is on an inside lane using 20-174 curves. These 150mm radius curves are too sharp for most of my trains, but the trolley handles them perfectly.
I started with a basic 4 x 10 loop with four lanes. Around that I added an extra loop with R418-15 curves. All five lanes are connected so trains can travel from lane to lane. Two turnouts are in the inside for storage. For the trolley, there is an inside figure eight with R150 curves. SCARM file is available here.
One extra note: I recorded all the video with an iPad and edited the video with iMovie on the same iPad. The software is not as feature rich as what I have on my PC, but it did the job.