Steve, your modified steel support towers look really good.
I got to thinking about how many different gauges can be run on 5-rail track if they all represent 1:48 scale.
1.25" is regular O-gauge, nominally representing standard gauge.
2.125" represents 8'6" gauge, representing a futuristic wide-gauge railway.
(England had Brunel's GWR 7-foot gauge until 1892 and Hitler proposed a 3-meter gauge system)
1" gauge is close to "OJ" gauge used in Japan and Taiwan for 42" gauge and 1:48 scale.
9/16" gauge approximates On2.
The latter two would be two-rail power, using the center rail for one running rail. Switches would be a challenge for these.
Five-rail allows a variety of operation!
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