UN4, you were probably ahead by a couple laps anyway... you can afford a skip or two

WC, certainly no drilling, just where the carbon piece has an opening. Like on the B44 top plate, the center is machined out. On the steering top plate of my Mugen there's a few machined openings. My TP is over a factory opening.
Not to say the servo is wrong... it's working. Just saying you can have it on carbon as long as it can see though it.