RE: CREAM CAR After reading your post, I went back to the Barney drawing. I scanned it into Blender as a background image, set the dimensions of a cube to four feet, and overlaid the cube on the wheel axel center points. Then created new cubes and set their dimensions to just cover the height, width, and length of the image. The width and height agreed with my previous dimensions. My length is off for an over the ends measurement, however the 28'10" figure appears to be correct for end to end of the trim under the roof edge. I think that many of these scale drawings are not always exact, and the width of an ink line can vary, and cause the serious modeler grief and frustration. I have also read that some drawing authors would induce errors to see if anyone was copying them. Also note that the Barney drawing was part of an On2 model kit sold by the Sandy River Car Shops, with precut pieces, and as such was meant more as a guide for the modeler. Another note is that what the drawing shows as the center point is off by a couple of inches. Ah the joys of researching these items!
Given all the fantastic TRAINZ SR&RL content you and others have developed, I need to get my butt in gear and upgrade to TS12, so that I can take advantage of all that's available.