With the advent of being able to place any train anywhere it would be great if we could have a "barrier coach" of sorts. It would be set that it could accept any ingame coupler at each end allowing e.g. a Class 150 to tow a RAB flirt around. P.s. can we have it made that as soon as you place a loco in free roam or timetable that it becomes "off the rails" it takes away alot of the fun of having a fleet of locomotives if you cant use them to your will without having to use them in a baren wasteland or create ai services to fil the world.