I just put KoolStop dual compound (black/salmon) on my tandem. Before I mounted them I scuffed the shininess off of the braking surface with some 320 grit sandpaper and they have not squealed and bedded in right away. I think KoolStop is using some sort of mold release agent on their pads and that causes squealing on new pads. On my CX bike with KoolStop cross pads, I had to set toe in since they don't have the little scraper piece like the V-brake parts. The easiest way to this is to loosen the pad bolt, slip a business card under the rearmost "bump" in the braking surface, apply the brake and re-tighten the pad bolt.