I purchased three Aristo streamliner coaches from the 'bay and because I run them in a certain order because of their wiring, I wanted to demark the last car.
So, I purchased an “observation end” and removed the old road name, but found that it resulted in excessive overhang that would not make my clearances.
I found a gent on the bay that sell drum heads. I ordered one for the Sunset Limited but had no idea how I would apply it, or if SP streamliners ever even had these.
Then I came across this picture:
And, Voila! The center LED flashes.