I am also a former employee of Siemens Power (before their purchase of Westinghouse).
I have a copy of the original builders plans (obtained from the drafting department at Siemens where I worked). I got a personal up close look at this car when it was parked on a siding just outside the engineering offices at Siemens.
Expect an article in OGR describing this model project sometime in the near future. I am negotiating with Allan Miller regarding a whole series of articles on various subjects.
Watch for some photos on OGR showing two more Westinghouse railcars that I have built. I just finished the Westinghouse Schnabel car #202 and the giant new Westinghouse car #801 (just fabricated by Kasgro last year for Westinghouse). The prototype WECX 801 is a 36 axle railcar that has a load limit of 2,035,800 pounds. With a scale length load attached the #801 model is over 5 feet long.
See the attachment showing the proto Westinghouse #801.