Rainbows in the Lehigh Valley Gorge

[TMo]

I elected to pry up the outside half of each piece of applied roadbed. A bit of a challenge with the scenic materials installed and the tight space between track and scenery. Some areas aren't pretty and will require scenic surgery (mostly cosmetic) once I'm happy with track performance.

I then inserted sections of 2-mm thick polystyrene along each outside edge underneath the roadbed for most of the turns, with 1-mm think pieces used at the ends of the curves to transition from flat to the 2-mm superelevation. Applied a bead of Titebond glue under each piece of plastic to secure them to the plywood decking, laid the roadbed over and rested some weight on the roadbed for about 4 hours to cure the glue. I've finished the north half of Mud Run Curve, hope to get to the rest tonight or tomorrow morning.

I'm debating if I should tack the outer edges down or just apply some silicone (leaning toward this option) between the polystyrene strips and the bottom of the roadbed - there's always a chance that once I put the track down that the base will need to be torn back up and tweaked.