Reading through all this again, i would too suggest its the front end thats the issue..
Especially if its hooking round lifting off into a corner....
Try different pistons, the spacers to alter kickup... ( on high grip carpet i take them all out..) remove any spacers of the ackermann..
Also on the slipper... are you using the same colour pad front and rear???
At Broxtowe on sunday, i could come round the corner at the end of the straight by just lifting slightly then back on the power once round it... if i gave it too much (trying to line up for the next corner..) i could opposite lock it and drift it totally controllably to square it up.. its never like what you describe...
Infact when i drove your car at the Xmas Cracker briefly.. the car seemed ok... then only thing i didnt like was the whole feel of the transmitter, just felt extremely " slow " in response..
YOu got my email.... i sent to the googlemail work one you set up when you finished for xmas..
