This video displays seven different engines running.
The outer loop is O gage.
Then a Lionel HO engine in a loop.
The 248 is on 027track in a figure 8.
In the beginning of the video on the left, up on the wall is a 50 Gang car.
To the right is o gage run with DC on a back and forth trolley line.
The outer elevated trestle is American Flyer.
The inner trestle is 027.
I will have have to look at it closer to id some of the engines.