NdeM Niagaras were the second lightest 4-8-4s produced. Why NdeM decided on that name is anyone's guess, but they are very interesting locomotives and unlike their NYC counterpart had long successful careers.
I am very happy to see more people take an interest in what I consider to be the most interesting railroad on the North American continent. I would model it if I wasn't invested in other roads of the southwest already. The RK ATSF Northern may be a good starting point!