As far as modding the plate vs the plastic, (as the guy who did it), and who owns both a dremel and a $20 harbor freight angle grinder, i think the mod of the plate was much easier.Would it not have been easier/quicker/cheaper to just Dremel the plastic hood instead mate?
plastic tends to ball up, melt, and nice edges are hard to come by. In contrast, the metal edge is almost perfect. Took about 3 minutes total.
Edit,,
also, in this case, when open, you would not see a notch cut into the shade, which i think is important.