Mark I am working on my abs system using oem ZR1 carbon ceramics, factory calipers, master cylinder, booster etc. This is running on oem ZR1 skf hubs, oem knuckles, oem SLA suspension arms.
Having not done abs on any build I am still on the lower end of the learning curve. A question you may be able to help with.
Will the Bosch M4 system work with the zr1 oem active sensors in the hubs? Obviously the M4 is the way to go (but it is expensive for what ultimately is a street car)
I would still love to find a way to use the far cheaper oem zr1 brake controller and abs pump and trick

the controller into thinking its standalone rather than looking for information coming from the zr1 BCM with all its active body control that is not applicable in this application.
Colin