I listed them in the for sale section. I have a set of Cobalt Friction with only one track day. Project Mu with about 40-50% in F and brand new in rear. Carbotech brand new in the back XP8.
I reviewed the datalog, no noticeable change in breaking power. I only noted some ice mode moment when I was running the Project Mu F and Carbotech R on one of them.
Ice Mode
https://www.dropbox.com/s/2kwhipklxs...e%201.png?dl=0
https://www.dropbox.com/s/do9prlvya9...%20CT.png?dl=0