Hey guys...thanks for the comments. I haven't done anything over the last 6mo towards this project except except source all my Atlas track. Acknowledge the grade issue...I'm only pulling 3 light cars plus caboose...correct though I still need to test. At some point soon, I plan to set the track up, artificially prop it up to the correct heights (boxes, blocks etc), and test. I'm thinking I might be able to get away with it.
Mike, EXCELLENT idea with the spray foam for the mountains/hills...I'm gonna steal that! I was already onto the XPS idea. I still want to tinker with a light epoxy layup over cheap-ole styrofoam. I have a bunch of 1" sheets in my garage and a bunch of leftover s-glass and about 2 gal of alpha epoxy (NOT polyester or vinyl-ester resins though!). There are also some techniques for using lightweight fiberglass screen mesh instead of fiberglass if you don't need anything "structural."
-Russ
