My Zephyr did not have a cab interior, with the big windows, I thought it needed one, so once I got my new lights in from Richmond Controls, I got to work: 1st step was figuring the size/location.
I used pix from a Zephyr book I have and from pix I took of the real thing in Chicago a few weeks ago.
About done, a few rough spots, but should look fine thru the window. May have to make my own engineer, the Z is 1/32nd scale.
I had great fun making this!