?? I'm using a Q53 setup i purchased a year ago with no problems on the moldings whatsoever. The clips contact the molding flush with no gaps and leaving no marks. Wonder what the difference is between the Q53 and the (new?) Q78? Only concern I have is with the rear connection, since the molding has a higher tendency to pull away from the car as opposed to the front.
Also, my clips came with a little sticky piece of vinyl to place on the contact point to prevent any damage to the moldings.