knockback is a thing on these- I use the 302R race box for abs, but to mitigate the knockback I installed some AP racing anti-knockback springs. They help, but aren't a perfect solution. Floating rotors also help somewhat, but on sticky tires you'll always have a small degree of it.I was talking to a coworker who worked on S197 program and they mentioned that the 2013-2014 GT500 with 6 pots got a knockback mitigation tune, which takes up the "dead space" in the pedal that is there after a half a lap of no brake use. The base and 4 pot brembos didn't get this tune since it wasn't an issue. Unfortunately for us, I'm not well versed in changing our ABS unit logic to that of the GT500, but I'm pretty sure someone here smarter than I am might be able to chime in.