The plot thickens......while tightening wheel berings AGAIN I noticed that my 3 month old pad replacement job has TANKED....oddly enough, it's the outer pad on one side that went to metal and the inboard is fine....what makes the outer pad hang up and shave my pads to nothing?? PS the piston was just fine when last checked, is it the rod that the caliper floats on bent? Help.....