Originally Posted by
LesterOfPuppets
One way to find the spot that needs a little tweak is to hold a sharpie in your hand and brace it against the frame or fork, spin the wheel and move the sharpie in towards the rotor until it draws on a high spot, or draws on all but a low spot. Don't forget to clean rotor with isopropyl alcohol before braking.
If I'm having a hard time seeing the high spot, I'll listen for it, instead. I'll spin the wheel and lightly depress the brake lever until it starts zinging and locate via relative wheel position. Then you just have to guess whether to tweak in or tweak out.