@ Bill69 - I was hoping that you would chime in on this thread. I have no idea what you mean when you say you create a new smoke container for each loco. Would it be possible to make just one for use in Ben's locos? As of now I'm running the 4-8-2 USRA Light TS12 as a test, kuid:96914:4780. My problem is that I can change bogeys and make the loading and unloading smoke different colors but that's about it. Oh yeah, I can eliminate the track in most of Dorsey's building so that I can have more freedom in choosing what I want to load and unload. In other words my experience is limited as far as the config file is concerned. Is it very involved creating a new smoke container? Thanks.