After discussions with friends and messages on forums i decided to go ahead with my plans for quad pipes on the rear of my A6 to complete the back end of the car.
And my new trick removable no plate:
I also decided to revert back to the standard number plate design and make it removable with a chrome surround to finish it off.
The bumper also required re-fibreglassing around the pipes and some work to fill in the gap where the old pipes were (and also some repair work on the sides from speed bumps!)
Now apart from maybe some new led rear lights the rear end is complete, now for the rest of the car......