I am in the process of adding a four track yard. I am using Atlas track and run scale size equipment. However, I can't give up my Lionel die-cast bumpers. I love them. I know they are probably oversized and they don't look realistic, but I am using them anyway. Nothing like putting a big block of cast metal to stop a train! Oh, and they fit perfectly between the ties of Atlas.
What do you scale operators refuse to part with?