So I've got a new 66ata and new set of I9 wheels. When putting it all together tonight, installed hope 2 piece rotors and snugged up the axle nice and tight, those round circle washers/spacer things that hold the metal rotor to the aluminum carrier rub on the bottom brake post. I've tried 2 different rotors with the same result, vented motos and the non vented hope from a M4/ mini brakeset. Should I get the file out and start taking material off the bottom post? They rub irregardless if the caliper is mounted.