Building large O gage layout, 17x38’, using Atlas track and switches. I am soldering my power and ground wires directly to the rails. Does it matter if you connect the ground to the same rail ( inside or outside) all the way around a given main line or can you switch back and forth between inside and out side rails since they are connected through the axels of the train? I am switching back and forth in an attempt to hide wiring on elevated sections of track.
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