Hey Carl, I'm far from being an expert but I think you are taking the long way round.
All the corners on the back half ( from the tight right hander on to the sweeper to the right hander that takes you off the straight ) you are a good meter or so from clipping the apex ( there is dirt on those corners for a reason
) probably the worst one that would slow you down a bit is the right hander coming off the straight, you aren't really hitting the apex and going wide which pushes you wide to the left and then you have to work harder to get back to the right hand side to take the left hander back on the skidpan. It's even harder when you are exiting the earlier right for the finish line.
Like I said, far from being and expert but there seems to be a good distance to the edge of the corners where most are cutting ( not hitting the cones though ) and the side of your car. Maybe it could be the camera angle but also something to work on.