Hello. I have a Ksyrium SSL compatible for Shimano. However, I need to convert it to Campy. So what seems to be the best/easiest/cheapest way to handle this? Can I just buy a campy freewheel and swap out the shimano, or the entire Mavic hub, or just buy an entire new rear wheel, or anything else? Any and all suggestions welcome, except getting a cassette conversion set like an American Classic or Mavic M10. Thanks.