Anyone else have an opinion as to whether I could use any of this stuff in any combination to upgrade an earlier 911?? Also, If I use the calipers, can I use the rest of the brake rotors, hubs, or just the calipers and then buy other stuff to make them work? I feel like this could be a deal to 'not' pass up but I have to give the seller an answer on Friday. Whole set up is VERY cheap...