Scroll up this page and look at my set up... I took photos of it... You can run 1:40's consistly with it, but once you get the feel, you'll get into the 1:39's... Notice my brake set up... 5 on front and 2 on the rear... And, be aggressive... Get on top of the wheel... You can do this... I did... lol
I think you forgot to show the LSD setting and how you setup the Transmission in detail maybe? Thanks for sharing anyhow and great time you achieved so far, long way to go for me.