@Madockawando posted:My current loops (O-48 outside and closed off O-36 figure eight in the middle) are spaced apart by 2.5 inches at their closest. I never had any issues with locomotive over hang so I expect that I can use tht distance between the new loops as well
Are you talking about edge-to-edge (i.e. outside edge of ties or roadbed) or center-to-center (i.e. center rails)? My earlier comment about 4" was center rail spacing, which with Fastrack's 3.3" overall width, only leaves about 0.7" of space between the pieces.
I'd be very worried about sideswipes with the two lines this close.