I have some avid 3s and the front brakes are howling quite bad lately and can even howl when the brake is not applied (after the brake is applied). I know this has been addressed in these forums in various ways but sanding the pads, cleaning the rotor, etc don't seem to have any affect whatsoever and I wish to delay buying a new brake system (rotor pads) as long as I can. I suppose I'm asking, have those with avid 3 brake system and the howling often solve the problem without replacing any hardware? Also, it seems like a harmonics thing. Am I wrong? Thanks for any input.