Spent about 1/2 hour to mark out and cut the glare shield. Spent the other 1/2 hour or so deburring the edges and drilling the holes where the panel support angles attach. I'm going to do a vertical panel, so I respaced the holes to be 15/16" apart instead of 1", and the center section of the glare shield gets a hole at the centerline instead of 1/2" to either side.
