I tried using the Cutoff Wheel but didn't feel like I had sufficient control so I went back to my old tried and true hacksaw. As long as you don't try to push it in very hard the cantelevered blade does OK. Image 1 shows me finishing off the cutout begun with the cutoff wheel. Image 2 shows me making what is one of the vertical edges and Image 3 shows the completed cutout.
Using a Hack Saw to Cut the Edge Between the Corners
Using a Hack Saw to Cut the Edge Between the Corners
