hi Tom.....thanks for the quick response. The 'shortcut' is very much appreciated. I guess my concern was the integral hole in the backing plate meant the pad needed to be trapped from moving in either direction--in or out. If I read your note correctly,as well as the others , that the pads are restricted from moving inward beyond where they are supposed to ride by design.... and the pin only serves to contain them from moving 'outward'--again thanks for the welcomed advice