Working inside the heart of a magical machine. Not too often does any railroader get a chance to work fully inside an enclosed locomotive. Let alone an F unit. The covered wagons are a thing of yesteryear, in favor of walkways and big service shops. But out on the shortline, things are always a little different. No big service shops. No long walkways. And a big F. At times, the mechanic doubles as a conductor, the engineer doubles as an office clerk, and even the president gets his hands dirty as he doubles as a mechanic. Working on a lazy Saturday, Stan opens the blow valves, checks the oil levels, and readies the F-units rebuilt EMD 567 prime mover for its symphony.