Fantastic ride for 2.5 hours. I had a VERY sore butt by the end.
I got unlucky with the wind, I rode into it in both directions. I got to a point close to the end where I was getting concerned I was going to run out of energy and be unable to finish. It worked out just fine though, and I felt pretty good.
The other lessons were:
15 minutes further equals 30 mins in total. I knew it but it threw me.
I am still not confident. More riding required.