has anyone had any experience with machining slotted rotors? i machined a set of slotted rotors for my civic because they had excessive runout and replaced the pads. When i installed them on the car they seem to drag a bit, kind of intermittently . i did sand the slots down to take the edge off after machining. i am wondering if i need to get a demel and grind the edge of the slots down a little better. maybe the pads need to break in a bit? any advice will be appreciated thanks