You actually could put a draw in the track to move the narrow gauge from one side to the other in each module. No moving parts needed. Then you turn them end for end and the third rail would line up, but it would look kind of stupid to have the third rail go back and forth through the modules. Then there’s always four rail dual gauge track, which was common on turntables and the tracks around them. In that case the center line is the same but each gauge has its own set of rails. A half-draw is used to go from three rail to four rail, again with no moving parts.
Dave Heine Easton, PA As I see it, with dual-gauge track you can still mix and match modules, but can not turn them end-to-end as you can with single-gauge track. Cheers Jim Martin S scale Workshop
