Ran ACL #1689 4-6-2 pulling an 11-car train yesterday:
This is a Williams/Samhongsa 3-rail brass USRA Pacific that has been repainted/lettered and converted to BPRC (the on/off switch and charging jack are under the removable black foam coal load), running on Atlas, Micro-Engineering, and Signature Switch 2-rail track/switches.
I'm still testing the layout, making sure the track plan is what I want before I attempt to put down any scenery, I'm in no hurry.
An 11-car train takes up a lot of space, even on a 12x30 layout. A whole lot of clickety-clack going on as the train makes its way around the mainline, I like it!!!