@the5thColumnist@stux The way it probably works is that, after going off the tracks, the model train hits the wall at an angle, and turns so that it goes parallel to the wall. Then the track was positioned so the model train got back on it.
@the5thColumnist@bzdev@stux yes some experimentation, but I think it doesn't have to be too precise. The angle to hit the wall must be somewhat shallow, the stretch along the wall perhaps a trains length, and then stabilize/tape the rail down where the train hops back on. This is very cool. Sadly I've been in too many developments like this.