Fishished hole for L landing light. Used new 2" drum sander to get cut within 1/16" of line, then used files, 1" ScotchBrite wheel, and 320- and 600-grit sandpaper to finish the job. Taped template back on wing, drilled 6 holes for lens mounting strips into skin.
I used a 2" drum sander to get the cut line to this point.
The finished hole, from the inside.
Match-drilling the lens mounting strips to the skin.
