Howdy Everybody. So, I am planning an O-Gauge model railroad of the East Tennessee & Western North Carolina (ET&WNC) "Tweetsie" Railroad, specifically the Johnson City to Elizabethon, TN portion of the line, which had dual gauge iron (track to accommodate both standard and narrow gauge stock), and my desire is to model this dual gauge track in order to accommodate both O and ON30 Scale trains. however, there is a big issue with my idea: I use 3-rail O-Scale like the the majority of people in this hobby do, so I'm worried about providing enough clearance for the underside of both trains, and to prevent either train from causing some sort of short. My plan is to use either Lionel Super O or Gargraves track due to it's thin 3rd rail. Can any of y'all help me figure out how to make dual gauge iron with 3-rail, O-Scale track? Thanks!