Very cool that you got down there at least a second time. Dunno if you were able to visit Verrel's layout in Cottonwood again or not, but you weren't bored anyway.
My paternal GF lived for about fifty years in Sedona, and through the other half of my family mom was born in Prescott. Moreover, her father worked the Santa Fe as a telegrapher along this same district, at Seligman* in particular. I THINK my two aunts might have worked Kingman further west, and they DID hold down the REA depot at the top of the grade out of San Diego throughout WWII. My maternal GF, by that time was a dispatcher in San Diego, so it was all of a piece.
At the top of that grade, where the REA office was located, a branch ran about ten miles east to the Marine Corps staging base at Camp Ellison. AFAIK, every Marine campaign, from Guadalcanal, through Iwo Jima and onto Okinawa sent its Marines through Ellison.
One of my aunt's told me how the engineer of one of the Santa Fe's Chiefs pinched down the throttle atop the grade so she could "de-train at speed." Which she did...tumbling down the side of the ballast line and breaking her leg.
Not a lady--staunch Catholic--to lie, so I believe her.
To say I'm proud to have even known them is to understate it.
There was a hobby shop in Jerome...up the steep grade from Cottonwood when I was a kid. He even sold brass...well beyond what my allowances could afford...
Really enjoyed your video, thx.
[*Seligman AZ, west of Flagstaff, was located on US Route 66, and it's the town upon which "Radiator Springs" in the movie "Cars," is based. As it also happens my uncle Leon was born there. No hospital there though and he lived only fourteen hours. Interred in Prescott.]