Being a Two rail, DC, builder myself, any "narrow gauge" will be correctly laid ( HOn42)...none of this Third rail Toytrain stuff...not even
Maerklin back in the 60s....
Now that I am starting a 1:48 fine scale 0n42 diorama, it too will be 2-Rail DC...no need for DCC unless I add sound. I can't understand why some hobbyists insist on this antiquated 3 rail power system with out of scale wheels, etc. Not proper Model Railroads/Railways at all....I abandoned my Hornby No.O Tinplate Clockwork set back in the Fifties ( rust and dust).
Moved on to HO, Sn42, andnow On42.
Doc AV Down under. Plop