Positioned L/H door skin in place on door frame for best fit. Layed out line for trimming. Then removed door and trimmed to shape with a cutoff wheel, pin router, and hand files. Positioned trimmed door skin in place on door frame again with spring clamps. Layed out hole locations on door and drilled up hole working from the center out. Clecoing each hole as I drilled. Once all the holes had been drilled, they were countersunk for pull rivets.
