This is an NZR/KiwiRail CE or CET coal wagon, as used on both islands of New Zealand. This model is scaled at 1:80 to approximately match Frateschi locomotives. Best results are probably achieved by printing as laid out in the STL file, then sanding the chassis (or both parts) until they can be glued together smoothly. Source photos are here: http://nzrailwaysrollingstocklists.weebly.com/ce---coal-of-2000.html I will add an image file for the appropriate decals when it's complete. Atlas 180000 or Kadee Barber S2 trucks and Kadee #147 (underset shank) couplers should work with this model.