I am racing this weekend and LBS contacted specialised and they sent through carbon vuka zipp bars and extensions. They have been setup by LBS as per my original fit. Only difference really being they had to fit a round s-works stem instead of the aero shiv one. Very pleased with how they sorted it out. Because stem is different I have option to swap back when fix is sorted.

Having tried new set up it actually feels better. It's lighter and garmin/torpedo system fits better. Tempted to stay with zipps.