People kept telling me the Madone looked like "Batman's own bike". But once, stopped at a traffic-light, a motorcyclist gave me the thumbs-up, and told me that if Darth Vader WAS a bike it would be my Madone... So I started to call the Madone "Vader"... Custom top-cap conundrum sorted!
Jesus wept
http://ec1collective.com/members-ride/marcos-trek-madone-9-series