I had that Atlas AEM-7, and when I popped the hood thinking about an upgrade I found that big horizontal motor taking all the space.
@ThatGuy posted:Well said, just think of them as a steamer………the trailing car/tender carries the electronics. I had to do this with my Lionel scale turbine. Small tether and poof we have TMCC
Hard to believe you couldn't fit something in a scale turbine, what exact "turbine" was it? The scale S2 has more than enough space for electronics. Of course, with a steamer, there's no downside to putting the electronics in the tender, you are going to have that with the locomotive anyway.
I'm loath to put the electronics in a trailing car for a diesel or electric, that really limits what you can run with it.