I remember reading a thread about how to ramp down to an industry from the main line. most answers were about sanding foam, cork etc to change the elevation of the track. I have just installed a track to an industry and the incline was the easiest I have ever done. I fixed the rail at each end of the incline and let the rail form a natural slope then simply applied ballast to fill the gap under the rail- just like the real railroad would do. I`m sure many have done this, but for those that haven`t, give it a go.