I can't answer all of your questions as I have an earlier SC but I think most people in U.K/Northern Europe manage without a fan. If you're not tracking it I wouldn't bother. Also you may find that the prices are different when you come to buy the parts in U.K. It's worth joining
Welcome to Impact Bumpers - ImpactBumpers.com which is UK based and has a lot of knowledgable people
Hope this helps
Ian