For your viewing pleasure, here are some photos and a video of my MTH Tri-Rail GP40 set-up at the Ready to Roll Trains hobby store in Miami that I ran yesterday. On the first Saturday of each month, the store allows model railroaders to run their own trains on the store layout. The O track is a mixture of MTH Scale Trax and Real Trax and the outer curves are both O-72. I had a blast.
https://www.youtube.com/watch?v=Xh8O2FYcArU&t=9s