Demonstration of how I made a 25" long foam riser with a gradient from 1/8" to 1" that is 25" long; giving a 2% slope. The wire used in the hot wire cutter is Kanthal wire. Riser is for the track to transition from the 1/8" cork roadbed to the 1" thick foam sheet. The Woodland Scenics risers are at a 4% slope, which is okay for HO but not N Scale, requiring me to make my own.