X29 doors are too short; that's why PPR used doors from the (taller) X28. F&C offers a resin kit (#8201 and 8203) with this door style. David Thompson

Photographs show 24589 (1/53), 25200 (5/53), and 28500 (5/56), so it is likely the N&W-built groups in 24561-25499 (1953) and 28500-29999 (1956). David Thompson

That one is a Cambre radial- different panel count. The roof on the D&RGW box appears to be a Murphy radial; I'd recommend cutting off and shortening the roof of the MDC 50' s/s auto box. David Thomps

These are the AMC version of the 1920s ARA steel-sheathed box, with the "innie" version of the early Dreadnaught end. This drawing shows the taller Dreadnaught end on N&W class BT, but the general pro

I'm inclined to think this is someone's outside metal roof, and not any sort of all-steel roof. David Thompson

Both CGW series had the "Murphy" radial roof, which is very similar to the Hutchins radial roof except for lacking the indentations in the corners of the seam caps. David Thompson

O&W didn't have much to do after their anthracite traffic collapsed in the 1940s. The 7/50 ORER shows 234 hoppers, 35 gondolas, 34 box cars, and 11 flats; versus 2803 hoppers, 202 gondolas, 58 box car

I assume this is the Bethlehem mill gon? I expect there are a number of B&O paint schemes they haven't done yet. David Thompson

RF&P 16 was one of series 11-18, conversions of the series 7001-7062 70-ton twin hoppers RF&P bought secondhand from B&LE in 1972 to replace its steam-era hopper fleet. David Thompson

Here's another raised-roof box. https://donstrack.smugmug.com/UtahRails/Emil-Albrecht-Photos/1947-Oct-Salt-Lake-City/i-Tnq2XQp/A David Thompson

Looks like there is already some corrosion along the bottom of the side sheets. David Thompson

I have no idea why he said that. The car in the pics is pretty much a standard AC&F Type 4. David Thompson

The underframe is a typical ACF Type 27, as is the tank. The vertical rivet rows are for the internal bulkheads that separate the tank shell into two compartments. David Thompson

Out of the box, it's good for the Canadian Pacific cars it was modeled after. Light modifications will get you DM&N 3300-3399. David Thompson

The January 1955 ORER gives 30' IL, 9'2" IW, and 11'2" height to eaves. These are uncommonly tall and skinny hoppers for the 1950s. After thinking about it for a bit and playing a hunch, the ten cars

July 1950 gives 25 cars in series 5000-5491, no individual numbers. January 1953 is down to five cars: 5039, 5144, 5191, 5391, 5396. David Thompson

Looks like an insulated high-pressure tank, so ICC class 105 most likely. The Atlas or Kadee tanks are a good starting point. The logo on the side is for Smith-Douglass, a Norfolk,VA-based fertilizer

The Union Oil tanks look almost like UTL Type Xs, with the obvious exceptions of the headblocks and center yoke around the dome. The tank bolsters are also different, though a similar design. David Th

Dunno if refrigerators count as house cars; but the ends on Armour 1-2000 seem to be of the same general design (in a R2/4 configuration), including the little squarish nubs at the corners between the

SAL 23000-23499 were built at Mount Vernon in 6/48, so probably not. David Thompson