When I attended the East Coast Large Scale Train show in 2008, Rich Yoder was there with his imported EBT hoppers.
I showed him the EBT Boxcar that I had built and he offered to trade even.
I immediately accepted.
I built a set of four hoppers using plans for ET&WNC hoppers.
These are more to scale and fidelity towards the prototype than my original model.
All lumber was cut to scale from basswood sheets.
The grab irons were individually formed to the prototypical shape and size.
For some reason, I ended up with all even numbers: 12, 18, 28, and 40.