I've noticed while playing Pak128.Britain that when a tube train stops at, say, a regular brick station, it looks rather out of place. The platform covers half of the train and it looks as if the platform goes up to the train window. As we don't have subsurface trains yet, I thought to myself about modifying the narrow gauge stations for the deep level tube trains, and maybe drawing a roundel on it. How should I go about doing this?