Taking the idea of foreign road to an extreme, here's the last (yea!) of the C&BT upgrades from the stash -- a StLB&M double door boxcar. Yes, C&BT offered a DD boxcar carbody as one of their variations, and several interesting prototypes can be modeled from it, including UP, ATSF, CB&Q, SBD, SSW, and B&O. The B&O M-59 would have been a natural choice here, but I already had one courtesy Sunshine Models. So it was off in a very different direction with the StLB&M prototype.
If one overlooks the prototype's 15-foot door opening vs the kit's 14-foot, the kit's postwar Youngstown doors are a decent match. Replacement parts include a Yarmouth Apex runningboard, Tichy 8/8 ladders, and Kadee grabs and brakewheel. The deep sidesill was shaped from .040" x .125" styrene. Decals are Mask Island with leftover StLB&M reporting marks from a Sunshine set (never throw anything away!). Weathering matches the prototype photo -- a heavy layer of Texas dust.
This one completes the six-car pandemic project -- to upgrade the C&BT kits which have languished in the deep stash for four decades. Again, a big posthumous thanks to Richard Hendrickson for the inspirational Model Railroading articles in the late 80s, and to Ed Hawkins for his outstanding spreadsheets simplifying the correct detailing choices.