Hello StreetH.
Nice film - and commentary (well, most of it!)
Interesting how the automatic aperture problem persists even in your top camera - bright sky, black roads - in a similar way to the 13 quid ones.
Wind noise: find where the mike hole is, and stick a baffle over it. Cotton wool might do, or 'fur', or foam (think of TV sound recording kit - big furry covers on mikes). It shouldn't affect your speech, but it'll cut out some of that annoying wind which makes it sound as if you're doing 80mph.
Dirty Old Town - I knew the bloke who wrote it. He used to tell a tale about another of his, Shoals of Herring, and some Irish geezer who argued black was white that it was actually Shores of Erin, a traditional Oirish song he'd learned at his grannie's knee.
Your commute is definitely A Hit, and I look forward to the traffic (I love traffic)...
Allen.