I've watched a couple of top 10 replays now but they didn't help much. I can see a couple of places where my lines could be better but they were very different styles. One guy, 1:05.5, was using ASM and kept it floored through the esses. The top guy, 1:04.8, was using no aids and feathered the throttle much more. The weird thing was it looked like his brake pedal wasn't completely releasing. There was a constant flicker on the brake indicator and the abs light kept coming on. I don't know how accurate the replays are but how can anyone go that fast with the brakes dragging?
I've only just realised that you can only watch replays from the first screen and not once you've started your laps.