Lee, I don't do much at the moment, just filling in time doing barwork, until the engineering companies start hiring again, shouldn't be too much longer:D
Traction control is wanky stuff:p The traction control works via hall-effect sensors, and sends a signal to the engine to drop the power, rather than a second butterfly infront of the plenum like the factory fitment traction controls use. Not much good on turbo engines as it lets the turbo fall off boost.
What's the point of the 12000 rpm? Even for the top speed GTR's there isn't any benefit of past 11000rpm, and most will fall off power well before this. So apart from highspeed runs can't see why you'd bother.
Proven by who? Wow, my car must be weird then as in stock turbo form is made more than any other GTS-t, with the only difference being the Greddy manifold:D