Alright this is my first post so dont beat me up to bad. Im currently running Shimano 105 and looking to upgrade to Campy. Ive been looking online and was wondering 1) how hard that would be and 2) Is there a difference between QS and not QS campy. I was looking to go full record or chorus and was curious about the QS thing and whether or not all the components have to be QS compatible. Thanks for any help.