After creating the corners with the hole saw it was time to get out my metal hacksaw and start cutting out the center of the lens cutout. Images 1 and 2 show me cuttig the straight edges between the 2-inch diameter corners and image 3 shows the final "rough" cutout.
Using a Hacksaw to Cut the Lower Surface for the Landing Light Cutout
Using a Hacksaw to Cut the Upper Surface for the Landing Light Cutout