I can't find it.
I would swear on a stack of Bibles that I read the builders had found a NOS "highway helper" wing - no, I'm not confused with the "freeway flyer" tranny - that improved cooling and aero. I keep looking back through the articles, I just can't find it.
And I was wrong about the initial mileage, too. The original Type 3 whistled up 28, it got 29.9 with a chassis tune.
Hey, CR: my favorite VW-based sports car: the Puma.
Not the convertible, though. The proportions get weird in a hurry.