Hi,
I know nothing about more things than I know about some things.
I'd never considered dual brake wheels. Makes a lot of sense - just never thought about it. I admit that I'm biased about what I know about more modern equipment - never thought about what might have preceded. Enjoy learning though.
I know that the D&RG(W) is not all. My second most interesting narrow gauge is the local (GA) Gainesville Jefferson & Southern (later the Gainesville Midland). Found all sorts of items about the Roswell Railroad (GA) also. The GJ&S?GM was SGed in 1914 and the Roswell was SGed in 1905. Neither the photos or route miles that the D&RG(W) had.
Thanks for helping me learn something new.
Doug vV