Just in from work and just happened across this now. Well Done, Dave for posting this and Jim for the PDF. JB, I think this would be a great solution for any layout with gradients, especially a smaller layout where space may not be readily available to allow a long enough gradient even to get one track to climb over another even though this only requires a few inches. Great if this is done at the planning stage as you'd have to tear up sections of gradient to cure wheel slip otherwise. Tedious additional step to do this on a larger layout though if your were to do it, certainly would allow smaller engines to shunt longer trains