Nice work! For the record, I've had mine on since the beginning of summer and had the dealer recalibrate the ACC but it did not work. Still having issues with passing trucks on the HW. I've actually just gotten used to lighting overriding the gas so that it doesn't slam on the brakes. Hopefully...
You're asking about a special tool for the rear brakes. These brembo brakes are only for the front. So no need to worry about the rear.
PS the tool is called a caliper compression tool.