See. you have some of us foaming at the mouth now over these.Here's some of the si qua non of this world. These guys never cease to amaze me! There's been a handful of Big Boy live steam models built over the years. In fact, right now, Union Pacific is rebuilding one of the originals (full size, largest practical steam locos ever built) in Cheyenne. Hopefully, it will be running sometime in 2019. Road trip!
I'll have to check and see if this place is still for sale, it's not that far away
And found this, while viewing your video's
The largest in the world, but they don't tell where it is