I recently rebuilt a room and mounted the electrical boxes for a traditional 2 outlet box deep enough for ½” drywall. Unfortunately I used 5/8” drywall which leaves the sockets too deep within the wall to create a flush look with the face plates. Because of the waves in the walls there is a difference between the 3 boxes, one is about 1/8” too deep the second and third are about ¼” and 3/8” too deep respectively. Is there a way, without buying recessed plugs, to make the plugs flush with the face plates? I was thinking about placing galvanized washers between the socket and the box where the screws hold the socket in place. Are there any other methods that you would recommend?