Lars,
You have only been refering to a situation where you are mooring stern-to. While that is most common in Europe, the United States and Caribbean are predominently serviced by marinas in which you often have to maneuver the boat in a series of "S" turns in order to reach your slip inside the harbor.
While the protuding wing stations offer the best visiblity, I have always found a permanent station located inside the bulwarks to be sufficient. This will cause to captain to have to lean out over the side to directly see the fenders, but it is more than adequate. With this configuration, there is no need for fancy fenders nor moving parts to retract the station.
Again, Double Bling looks to be a beautiful design and I would be proud to be her captain!
Ken