Hello - I need some advice. My father is a big Virginia and Truckee fan, and he owns one of the Prospector sets lettered for V&T. I've gotten together material to build one of V&T's wooden water tank cars to go with my Dad's train set - birthday gift most likely. Before I get started I need to clarify a couple of things...

First, am I correct that the Prospector set is 1:20.3 scale?

Finally, it seems that Bachman tweaked the proportions of the Prospector cars to make them more compact and better able to manage curves, similar to Lionel. The passenger cars look like they're supposed to be 50ft Overtons, but they seem to be about 35 scale feet long. Does anyone know if there are some proportioning factors I can apply to the length, width and height of my tank car, so that it doesn't look freakish next to Dad's passenger cars?

Thanks, in advance, for any help anyone can give me.