Hi
just playing devils advocate for a minute - why are you lifting off? The point of the stiffer rear arb is you should be able to get on the power earlier and exit the bend faster. You should also be able to enter more quickly too. Granted driving style will require adjustment.
Suppose that was a comment for me?
Well you do have to lift-off once in a while, you can't just floor it 100%. For one thing, you'd have to stop at some point and sleep - it's dangerous to drive 24hrs, all year around - especially at full whack.

Anyway, I'm sure it would be harmless if I had just put the Whiteline there and not done all the rest of the mods.

That said it doesn't bother me, I do like it and the handling is very good now. It's just that whiff of understeer left at hard cornering, it's a bit soft upfront still.