I'll try to describe my question.... I used Woodland Scenics 3% risers on my HO 5'x9' layout. I used cork roadbed for the entire layout. When the roadbed transistions from the level surface of the base board at the bottom of the incline it forms a dip. The track then wants to set 1/8" to 1/4" above the cork roadbed in this area and make its own transition, which accually is a smoother transition into the incline. My question is how is this space filled in?? I'm afraid if I just push the track down to the roadbed it may cause issues with derailing or uncoupling. Has anyone else experienced this issue?