PS: I think the original design was more interesting with the lower track crossing under the upper track twice; not once as this is. This "feels" more geometrical in my opinion. I realize that it does make the construction slightly easier and the grade lower. However, your grade, even steeper, will be fine because of limited train length. You already tested which was really smart.
Going under twice makes the route seem more interesting to me. That's my two cents. Ultimately, you will decide what will work best for you. :-)
