Layed out the hole for the L/H Microsun taxi/recognition light on the outboard slat. Drilled out the rivets for the outboard rib and removed it so I can get the light in the slat. Used a unibit to drill the four corners of the cutout. Used a cutoff wheel on a dremel to cut it out. Used a 1/2” grinding wheel and then sandpaper to smooth the edges. I made the hole smaller than what the drawing shows and will probably make it bigger once I see how the light centers in the cutout.