just have the calipers rebuilt by a builder , or i've bought rebuilt ones on line , sorry there i go again with that online stuff , sorry . i just try always to find the good parts out there . yes i've run across that rubbing issue , those are mustang rotors blanks that some suppliers put the 4 bc in . but buying name brand parts helps . i start with used complete assembies , spindles , hubs , calipers , brackets , hoses , bolts . and clean up the parts and replace every thing as needed to have great working rebuilt discs . i'll have to look to see if i kept any info on the supplier .