Well I took a quick look at your spr and a few obvious areas you can improve are the 1st corner and the chicane.
Brake a fraction earlier into 1st turn and brake parallel to kerb and be coming off the brakes before you turn in. At the moment you are still heavily on brakes as you start the turn in.
Also take more right kerb in the 1st part of chicane, you should briefly have all 4 wheels on the kerb there, and just as your wheels leave the kerb, turn left, in the replay you were a litle late turning left.
At the end of the main straight, again I would brake a little earlier, around the 100 metre board and use more left kerb before you turn in.
In general you need to use more of the width of the track to straighten out the bends.
I'm not sure about the setup, I have tried the Nilex set before and it doesn't suit my style of driving.
If I see you on the server I will send you a couple to try out.