I am looking at taking delivery of an inventory Model X which has everything i want except for the $250 Accessory Hitch. I don't plan to haul any trailers, but would like to use a 2" bike rack for 4 bikes. How difficult do you think it would be to have the accessory hitch installed after production? I asked the salesman, he didn't think so, but he sounded like no one had ever asked him that before. Thanks.