After a space if illness, I said I would re-visit this, and well here you go. The feedback I got was amazing, so will let you all be the judge.
Here is the Change Log for V1.3
Set the Power and Coast Diff to the correct default values
Diff can now only be adjusted in increments of 15
Diff Preload is now correct and non adjustable.
Steering Ratio corrected and Steering Rod Lenght
Lowered FF Slightly (to much clipping)
Weight set correctly for DSG Model
Slightly adjusted front tyres...