is the only issue that you have to cut a painted bumper instead of a plastic one? or is something actually different in how the msport bumper mounts? i have an 09 and i would like to use the factory hitch. ive done a bunch of searching an no one says why most dealers will not install. while shopping around i test drove an msport with a factory hitch installed so i know its possible, but i want to know what im up against. any info appreciated