I thought the same thing, but he did use a 16x19 in college.
FWIW, I know that I had to use the top green grommet insert instead of the black one (from a CV Blade) on my 2015s, when I replaced to the black grommet. Oddly enough, the black grommets add slightly more SW than the green grommets. I've yet to get a CV and put the green grommets on, but I will do this at some point.