I saw what you did there!
If you took away the etched running board and MTL couplers, I'd think this is something from Con-Cor/Kato circa 1978.
The car looks nice except for the ribs which don't appear to come out far enough to the edge of the car. There's a distinct difference between the 'deep' and 'shallow' ribs on the prototype. The HO car looks similar so I doubt anything would be done about it and it's probably not something anyone besides me would notice.
I think the trucks are the same as the BLMA 70 ton Ride Control, so at least that will be easy to improve.
I won't comment on the brake wheel except to say it a shame if BLI thinks that's good enough for N scale.
Jason