I've often dreamed about yellowtail on the fastrac... As long as you put strong hooks on em, I don't see why you couldn't catch one. I wouldn't rip it quite as fast as the iron, but I'd definitely pick up the pace a little bit from the white seabass/halibut retrieve. 30# may tweak the action a little bit, so that could present a problem. For yellowtail you could probably throw em on 20, but the threshers would need at least 30. We'll see. I'm gonna do some messing around with em this summer too, so we'll find out what happens.
-Brian