I am running D/A 7700 shifter/brake lever, Cane Creek SCX-5 Cantis and Swiss Stop combo (salmon/black) pads on a Surly CC for commuting. I had hoped that the Swiss Stop pads would have eliminated the front brake squeal...they didn't. I set the pads so they are toed in exactly right. The more front brake I pull the louder the noise. At this point I would invest in different brakes to get rid of this squeal. Any suggestions? Should I rough up the surface of the pad with sand paper and clean the rim again?