Added some detail to the blue boxes

[Puddlejumper]

As for the GE's, I really don't know why BNSF 4560 and NS 8447 would have swapped doors. Unless someone in the shop was being funny. I have no doubt it probably occurred at Altoona when the BNSF unit was on NS rails. Either that or at CEECO when the NS unit was out on BNSF and needed some sort of repair.

I really like that photo of the BNSF blue unit with the Conrail showing through.