I just popped the rough fiberglass plate holder off of my make shift plug yesterday. It was so easy to do, I have the plastic cardboard stuff that nothing will stick to( real estate signs are printed on the stuff), it's called COREX...and it makes a great paste-up fiberglass mold or plug. I simply made an extraction in the body where I wanted the plate to go, and fashioned a temporary mock-up out of this COREX Material. my plate holder includes the twin exhaust port holes that reside below the plate holder. I have pictures of the plug and raw fiberglass panel. the trick thing that needs to be done is to match the plate holder panel( which my panel is about 16 x 16 inches square)with the contours of the body, cause if you place in a normal equal distance offset panel into the tail end of your car, it'll place the face of the plate at an acute angle to the ground and make it weird to read...which will add to law enforcement hassles, along with just looking stupid. so the top of the plate frenching is about 5" inset and the bottom of the frenching is only about 1" inch inset. it squares the plate to the view of all and thus looks correctly, and as you know the back of the car is not just slanted inward but also curved also ...so this COREX material lends itself to the contours of the body very well in the mock-up. by doing this this-way you'll have a very minimum amount of finish glassing to provide the perfect fit, also the 5" inch top surface of the frenched in holder make a great place for the light to go, big enough to totally conceal the light up into the body rear cavity( I hate the look of the little round dumb looking plate lights that anyone can get at NAPA. I'll provide step by step pictures and description of the process better when I send them after I finish. - Dan Richer