Hi Dave,

We're on totally different pages with shimming rotors to hubs.

If you can't index the run-out out then you probably didn't do a good job cleaning the hub. Use a tool like this that will do a good job around the wheel lugs: (and probably fill your nostrils with PFAS)

https://www.ebay.com/itm/266689700559

I struggled with using antiseize on the hub to rotor face with the ATE rep in Germany, who finally convinced me. No grease, no nothing except light oil
on the hub to rotor faces that you wipe off.
Use only zinc coated rotors so they come apart later without having to use
a sledge hammer to remove.

I looked again at ATE's USA parts catalog for the 940 and was disappointed.
They have rotors and maybe rear brake shoes, but no brake pads in the USA catalog.
I know that ATE has a chain of garages that do brakes in EU and probably has the
OEM quality or better pads there. It looks more and more like a dealer /manufacturer sweetheart deal for parts.
I'll call ATE USA to find out tomorrow.
Maybe ATE sells 940 brake pads in Mexico?

Perhaps it's the same story with Zimmermann where you can't find the rear rotors.

When I first got my 940 I had nasty high speed brake judder, and replaced
sloppy inner and outer tie rods. The judder was still there with no apparent slop and very low rotor runout. I got the Zimmermann coated rotors and Volvo
pads new brake hoses, etc but stalled the job as I did brake-in routine
slow steady gentile stops from speed when possible. Now the judder is gone
with the same parts. My guess is that a hard panic stop can mess up the rotors.

Keep smiling, Bill