Updates? Or project on hold?
I proved the concept and test fitted to my bike:
Brembo 330mm OD floating rotor
Brembo P4 calliper - 32/34 and the far superior 4 pad, 34/34 piston models are externally the same for our purposes
Brembo RCS 15 master cylinder
Custom 7mm rotor spacer
Custom ABS sensor mount
Custom calliper bracket
I then removed it to make the calliper bracket, and got sidetracked on my sidecar project and just finished - pic attached
Sidecars typically require more trail than a solo bike, and one way of doing this is with different yokes. The other way of fitting a 4 pot calliper is also wider yokes. I am now trying to decide if I will make offset yokes with more trail for the sidecar, and at the same time make them 15mm wider for the 4 pot calliper. I will ride the sidecar outfit a bit before making this decision.
For the solo bike rider, without a machine shop or willing to pay commercial machine shop rates, wider yokes then would then be a bolt on mod well within the capabilities of the mechanically inclined rider - yokes are not cheap however. OTOH, I might be able to reduce the machine work in the stock yoke method, and need to think about mounting the ABS sensor on the calliper bracket for a simple bolt on big brake kit that will not break your wallet
I might get to that in the next week or two