Switching with an F unit is a real PITA from what I understand and understandably so.
Jonathan, I'm not an advocate of using the rear view side mirror for switching, but on an EMD F-unit, there's no other choice unless you are very tall, with very long arms, and a lot of dexterity to reach the throttle, reverse lever, and air brake valves while your head is outside the window, which on F-units built before late 1950, was low at the top, due to the control switches and headlight switches being located above the side window.
In late 1950, EMD adopted the taller side window (originally applied to E8's 1949-onward) and moved the switches to the side of the control stand. Better for lots of reasons, but switching was still uncomfortable.
That's why, years ago on the OGR Forum, I posted a reply to a thread which inquired about what we would choose if we dieselized with only one locomotive model. My choice was the EMD GP9 with 24RL air brake and dynamic braking, except for a small steam generator-equipped sub-group.
By the way, some of the early versions of Santa Fe CF7's still had the control stand and air brake pedestal located in the same position as on the F7 they were built from - and - in spite of a sliding window, they were uncomfortable to switch with, if you put your head out the window to see hand and lantern signals.