I've got a couple of issues with brakes on a 905 and 705, both new. The 705 has rear squeaky and grunching noise on harder braking. The front brake of the 905 as the same grunching noise. I swapped over pads from 905 to 705 rear brake but the squeak remained. I've cleaned all 4 rotors with brake cleaning fluid and used a fine paper to take anything of surface of pads but the issue remains though the grunching noise is less. I tried also loosening the calipers and applying brake and re tightening to ensire they are correctly aligned. Any suggestions would be welcomed.