The autopilot servos need to be firmly mounted to structure and the 3-ply carbon floor will crush when screws are torqued. The floor required bushings at the screw locations to allow the screws to firmly attach to the structure below without deforming the carbon fiber. Here are photos of making the bushings and then locating the screw positions, drilling the carbon floor, and bushing the holes for the servo bracket. Little details make a big difference.