Yes, look, what it will do, Patrick, it will allow you to advance quicker having bigger crush pillars. And the key here is to get a greater advance going forward so you can access the open stoping horizon if that's one of the benefits. And then the other thing is you know all of this gets mined anyway. We're all on strike here. It's a question of sequence. Remember that the way the mine is mined, we have primaries and secondaries, we mine the primaries, and we have a secondary next to it. Once we've finished mining the primaries we backfill, and then we come back and mine the secondaries. So it all gets mined over the life, except obviously for the stability pillars between the corridors. That will also probably get mined, but that will be mined much later. But the crush pillars will get mined down the road. So it's really a function of trying to advance quicker. I mean, the one thing that I think sticks out from this is moving to a five meter by 4.5 meter destress cut. It's all on strike, right, so it's on reef. So the other benefit you might get of having bigger destress is not that we avoid mining it three times, which is what we're currently doing. We mine it once, and support it once. But also, you should be getting more tonnes per meter advanced because the cavity is bigger, and that's on reef. So that's one of the other benefits which could offset some of the lag effects of leaving some crush pillars behind until later. But look, to be frank, we don't have a strong resolution yet on what the likely state-to-state profile is going to be. Hence the reason we've said we're not going to give you a new long-term plan until early '17. Until this whole transition is rolled out, it's going to be difficult to estimate the full impact of this. So you can imagine, in '16, it's a transition year. We're going to be moving stopes across high-profile. It seems you're going to have to get used to it. But those are some of the benefits of moving to these. We'll move quicker with bigger crush pillars. And of course, we'll mine once instead of having to come back, mine up a hanging wall, re-support, and make the whole cavity bigger before we can access the open stopes. All of that now goes. We have one cavity, we do it once. So I think when we do the February results we'll spend a bit more time on this. Because I think by then we'll have a better idea of how the transition is going.