well, i really wish he had posted a link rather than apic so huge it distorts the page and takes forever to view.
As for the location of the craftworld, not quite.
craftworlds are not fixed in space, but rather move , usually in some elliptic path. there are exceptions, but you'll note that in codex tyranids (for 2nd edition) iyanden happened to be in the wrong place at the wrong time, as thier path crossed withthe hive fleet.
-+G