LOVE ALL of that, Pat, and well done you...
However, the biggest 'brake' MOAN on both the TTRS and RS3 is Low Speed 5 to 0mph Brake Squeal during road-use and them that have it want that sorted and with respect to Audi UK and Audi GmbH it was Audi GmbH who's said they'd sort it and at date; while they attempted to do so with the 47i6 upgrade applied if complaining to some cars the issue was not satisfactorily resolved for all. The 8P RS3 has now gone as far as Audi GmbH is concerned and their interest now firmly focused on the 8V cars.
The fitment of the Brembo anti-squeal shims to the standard Audi brake pads, both 47i6 and pre-47i6, with a smear of CeraTec sorted the low-speed brake squeal issue for me and the use of these additional shims keeps the brake pads 'insurance' friendly and does not invalidate the Audi warranty.
Maybe an opportunity for you Daveb1970 to offer an anti-squeal shim kit of parts(?).