I've read lots of horror stories of turntables, engines that fell into the pit and poor alignment. I have a trains magazine from the 60's with a picture of a SP F7 b unit in the Sacremento pit! Also, in the summer when it would get warm a lot of turntables would jam from expansion. I read once of a engine that fell into the pit and the railroad actually knocked a wall out of the roundhouse and laid a spur track to get a passenger engine out! Ladder tracks and wyes were much more reliable but took up a lot of room. This is why so few turntables and roundhouses survived after dieselazation.
- Little Stan