Hi Colorado hirailer:
I personally do not plan to model narrow gauge.
But as you probably know, CB&Q had narrow gauge in IL (Fulton County narrow gauge), IA (Burlington-Washington branch), & South Dakota (Black Hills) that were later standard-gauged. I have never heard that their depots were any smaller than Q standard gauge depots.
The Q subsidiary C&S (Colorado & Southern) also had many narrow gauge lines in CO.
What is the ET&WNC ?
Thanks in advance,