Thanks to everyone who tried rail-ly hard to track down the correct answer to Trackside Treasure's second anniversary contest skill-testing question. Elijah from Saskatchewan sent in the first correct answer and associated research, and wins the prize pack. Pictured above: Canron's Rail Change Out unit (RCO). Congratulations, Elijah!
Honourable mentions go to: Robert from Washington-Canion/Tie Cranes, Bryan from California, with the most possible (and most hilariously arrived-at) answers, and even my sister, who by osmosis has apparently amassed a surprising amount of railway knowledge, allowing her to come up with the right answer. Sis, I'm no nepotist, but this one's for you: a CP blog. (Spoiler alert: it's not the same CP you might expect me to link to.)
Watch for an upcoming post on the RCO. Indeed a clever collection of readers and guessers. Weld Done!