I know there are some sound issues with some Preserved collections and Adam has asked us to report them, so just letting you know my observations with the 31. In a nutshell, the external and internal engine sounds need a bit of mixing, when the cab door is open it sounds the way it should, but close the door with the window open and the sound attenuation of external sounds is far too much, close the window and there are is almost no external sound. I hope these observations are useful.
