Thank you for that video Rick!
Unfortunately though, after a little more digging, it looks like the 3-Bay hopper I selected gets disqualified because it's a model of a Virginian hopper that the N&W acquired in 1960.
The 2-bay hopper is also deficient in that it doesn't include the N&W's signature "peak ends", which are the raised ends of the cars as seen in the video.
Guess it's going to have to be "close enough" on these