Found this aritical that was sent in over a few Yr. ago from a Buddy of ours ( Joel Harrisons… A Aristo Craft 2-8-8-2 rebuild. ) that we helped build his layout so he can run this type of power using nothing over 1 % grade. He wanted his layout to be like the Feather River Canyon route grades.
In the Garden R.R. Mag. Issue April 2015, on pages 54 to 57.
Here is the video we did and held off until Joel H. got it in the Garden R.R. Mag. Sure is a very smooth running Eng. with lots of power.
Here is also the link.