Yes, there is. A couple reasons why that resource didn't grow at $1600. One is drill density, their mineralization does extended depth, there's no doubt about that. We just don't have the drill density down there to necessarily pull a substantially larger resource pit. But more than that, as you get down into the depths of Tasiast, you're looking at huge strip ratios, so a lot of capital and when we did the resource calculation here at Tasiast, and this is an important point, we did it assuming open pits. In other words, you ran your pit shell at $1600, to see whether you pull a bigger resource based on drill densities, and it didn't, it didn't pull much bigger pit. But we didn't evaluate the resource potential in this calculation with an underground. And this is why the move to $1600 is literally just the first step. I mean, as you can imagine, we've been at 1400 for pretty close to 10 years, and a lot of our drill programs are tailored to that. So there's not a lot of drill density beyond $1400 or $1500 pit shells. So as we look at different potential expansions, mines will have to tailor drill programs to go to tighter spacing into $1600 old pit shells, but more importantly, look at underground potential. And so assets where we have begun engineering work on underground potential at Tasiast, Round Mountain and Phase X, could Phase X, which is the next phase of W, could that be an underground? And are there underground opportunities at Bald? So we didn't do that in our year and resource calculation, but it's something that we are going to start to look at this year. With that $1600 resource price, is there a different mining method that would yield a bigger resource at particularly those three assets, has this round evolved? And I suspect the answer is yes, but we need to do the work.