Sometimes you have to live with a little squeal. My front canti is Paul's low profile, the pad is Kool stop salman low profile, and the rim is Velocity Dyad. I have done everything, even using a nickel as a shim to get the toe in angle fairly wide. Problem then becomes you lose braking power. I even used a fork crown cable hanger to shorten the length of the cable. Nothing eliminated squeal completely. Recently, I tried a shorter pad and that seems to have helped quite a bit. However, when I brake really hard, it still squeals. The moral of the story is, make peace with the squeal and embrace it. The good news is, it means your brakes are working!!!