Imo kerbs are fair game.
I'm betting some people are severely cutting turn 9, riding the bollards heavily if not 4 wheels off the tarmac there.
I can't break 1:19.xxx
Gave it a quick try in T-Cam last night.
Your driving is so smooth and precise, I guess that's down to using a wheel. you take the first corner in 2nd, I do it in 4th although you could have a long gear ratio so that may be the reason. Your whole lap looked tidy with only a few bits of understeer.
I'll wait for mercyless to post his secrets