These days I can layout and mask my stripes in about two hours....the reason I can do that it that fast is because A. I do it all the time. 2.I have figured ways to beat the clock and 4. CAN'T SEE IT FROM MY BACK YARD !!!!!!!!! The way I do my centerline these days (totally cheating) is tape the hood and deck in place. Tic mark on the center trunk light, tic mark center of scoop opening using the two front mount holes to find the center, Tic the center of the mouth. I run blue 1in tape over the center of the car landing the center of the tape on my marks. You have to lift and set the tape a few times alternating front to back to get the tape centered. Mark the rest of the stripes from the edge of the blue tape. Run your first fine lines right on the edge of the blue tape...da Bat