Is the two-seater Avenger trainer an idea that's completely and totally dead now, or is it still in the back of our minds?

It's fairly dead. The two-seater one, I know it was in-game for a short period, I think just whilst it was in the hangar. Because we didn't at the time have the tech to do that for its flight-ready release, and it wasn't a consideration at all for the rework. So there's no immediate plans for it.