I have standard rotors with Ferodo Formula pads (DS2000)...under light braking mine make this freaky harmonic vibration sound, like a squeal but on steroids...It has been back to a certain work shop 3 times now...but no fix. I'm going to give them one more chance then I'm taking it some place else...and sending the bill to the original workshop!
Sorry for the rant, but if you do find a solution please share...
