How long did the 304 ap’s last??? They are normally very very good. Very similar material to the Alcon. You can get Alcon 304 discs but I have no idea who stocks them
Do you do lots of heavy fast track work??? RC6 is classed as a full race pad and will be hard on discs.
I run PF pads and think they are great , however they are very very noisy until they are up to he correct operating temp (high)