^I upped rear downforce to full instead.
Quick advice:
1) Use the posted tunes, w/o them you'll be seconds off. Tweak spring rates/ARB/toe/camber to adjust it for yourself. Rake is needed for top-speed.
2) For ideas on what line to take have a look at
WRS Videos thread, week 22. Also read the WRS event thread on further pointers.
3) Few of my braking points:
T1 (I suck here): I brake about 2 car lengths before rumble on the left. I can do very little trail braking here, since it tries to spin (maybe using Tim BB helps, i like brakes at 7/8 elsewhere and didn't really try adjusting the BB on the fly). So brake hard, then turn and get on throttle as early as possible. Never have time to look at speed.
T3 (Coca-Cola): I brake at the little red marker on the fence between 50 and 100 signs and turn-in around 50, with some trail braking. Ideally - brake/turn a little earlier than that and grab some curb on the inside. Try to keep it above 90.
T4-5 (100R). Keep it tight. Lift when you see a red marker on the fence. half the time I downshift to 3rd once the speed drops to ~99 and floor it. The other half I try in 4th gear and keep >97 while trying not to go wide.
T6 (hairpin): brake at 50 marker. Grab the curb on the left, try to be on throttle before the curb. About 59-60mph on a good lap.
T10(Dunlop): brake 1-2 car length after the shadow from the banner. Trail brake, grab curb on the right. Keep it above 80.
T11: I brake at the start of green pavement on the outside of the curb. Trail brake. ~61mph. Go straight past T12, no maker for braking so use feel to backside the T13. I keep it above 51 on a good lap.
Last turn (I'm probably way off pace here too): I swing wide, but not all the way, brake when I run out of 2nd gear (eclipsi's tune) and bring it in to the apex. On a good lap (pretty rare) I can take it at 57 mph, flooring it at the apex.
Hope this helps.