Well... you sure planted the rear of this car down, sticks like glue. The turn in is a little slow for me so I took her out with a dfp and ran 10 hard laps, couldn't catch you on r4/r4's.
Pretty fast times mister
Some slightly tuned gears to get me closer:
2.9, 1.95, 1.425, 1.1, .895, final 3.4 auto 5 seemed to help with engine braking.