[Christ]

Due to the laws of inertia and centripetal forces, I'd venture to say that you're correct on that, MazdaMatt.

But, you have to remember that they're removing the entire brake assembly from each wheel. Federally illegal in this country, as yet, but still a big step... have you weighed rotors? They're not light.

You're substantially reducing both rotating mass and unsprung weight, before adding a stationary (not rotating) mass which adds back unsprung weight.

Homework for someone: Is there a law that requires that vehicle braking systems be hydraulic/air actuated?

I don't think there is for a modified vehicle... or for a period correct vehicle. This means there is a loophole in the "you can't use it without brakes" arguement.