Keith, I stand corrected because I was not specific enough. (My Bad) Yes, there were many compounds but what I should have said was of narrow guage export classes, specifically classes 22-27. If you look at your references, these locos are all standard (broad) guage.
For the most part these classes of engines did not, on average, last long in service. Just as with the Gresley A-class locos in the U.K. the center cylinder(s) & crank were a mechanic's nightmare. Have a problem with no pit close-by and you were up the creek without the proverbial paddle.