Hey guys i had new front brake pads put in almost a month ago now, the were blue Protexs'. When they first got put in they screeched really bad, so my cousing machined the rotors for me, it lessened the screech but it was still there so we took out the brakes grinded it down and grinded the edges as well, the car doesn't screech when moving forward but when braking when i reverse it still does and is loud, has anyone had an issue like this before and come up with a solution?