I recommend cleaning the hub surface where the rotor sits . If there is a build up of rust or dirt , it won't be completely flush and can actually give you a brake pulse . When taking the screws out of the rotor , you can run down 2 lug nuts on the rotor to remove some tension on the screws and they should come out easier . They are not Phillips but Japanese JIS - Japanese Industry Standard .
I recommend cleaning the hub surface where the rotor sits . If there is a build up of rust or dirt , it won't be completely flush and can actually give you a brake pulse . When taking the screws out of the rotor , you can run down 2 lug nuts on the rotor to remove some tension on the screws and they should come out easier . They are not Phillips but Japanese JIS - Japanese Industry Standard .