I had to do that with a set this week (chase the threads on PC march 5 spoke to install AP rotors), but also.... The thick paint left on the mating surface between disk carrier and wheel hub often is too thick and has to be scrubbed off or carrier won't fit over inner ring or disk offset is artificially altered by paint difference.
I say this not for you but to add for others..
ZX7RR WSB: Factory motor, Factory swinger, Ohlins WSB forks, Yanagawa carbon body and factory tank, etc etc
Muzzy Race Raptor