Nice video! You guys had some good racing. Pretty nice lines, Billy!
Over time, work on increasing your corner entry speed. By trailbraking (even a little bit), the car will still rotate into the corner, and you can carry that speed all the way through the corner.
Rob - this video is very instructive. You really need to turn in earlier - carry more speed into the corner, trail brake a bit to set the nose, and fight for that apex.
Mostly though, I see good, safe racing - lots of draft-by passes - you guys seemed equally matched in the car department, as it should be!