I'm reading Diesels From Eddystone: The Story of Baldwin Diesel Locomotives by Gary and Stephen Dolzall (c. 1984) and found that the Union Pacific ordered a pair of DR-12-8-3000s (aka Centipedes) to be numbered 998 and 999 in 1947, but they cancelled the order during construction. With no further orders booked for the model, Baldwin painted them in demonstrator colors and sent them out to work on the B&O, B&LE and C&NW without success. The unloved units returned to Eddystone and were scrapped in 1952. You UP guys probably know of these events, but I didn't and thought it was interesting. To think of a pair in Armour Yellow is pretty cool. UP always did things in a big way. PS: The book is excellent, with great photos and a really good balance of engineering and development detail. Highly recommended!