This is swayz, from the FF clan which died out sometime ago, he's one of the top dogs in quickscoping especially, only rivaled by ice falcon and pexi and other guys who I probably don't know about. His accuracy seems better now than it was back then in this video it seems. Try to observe when he decides to preaim, etc etc

Just skimmed thhrouggh it but look at the 7 minute mark, it gets insane

That guy is a bloody laser!