Yes, great question, Donovan. So, the original thesis when my wife and I started with our work map on our kitchen table, was that the Bakken would get deeper, denser, cheaper, better, expanded. And what that means is deeper, originally, the Bakken was just developed as the Bakken. We thought that the Three Forks would be productive at some point. That came to be, so it was deeper. Denser, we bought most of our inventory based on economics for four Bakken wells only per DSU. Now, since 2010 up to about 2017 to 2018, operators experimented with putting a lot of more wells into each DSU. That didn't necessarily result in the best economics. So, they backed off of that heavy number and relied on improvements in frac technology. So, anywhere from six to eight wells per DSU is now the standard. And we're recovering a tremendous amount more oil out of each DSU than we were over the last 10 years. The cheaper is that the wells would -- as infrastructure would be built out, the wells would become more economic, that has happened. Better, the EURs in the Bakken, almost on a daily basin -- basis, get better. You got to remember the Bakken is such an incredibly, incredibly tight rock. If you can increase your recoveries by just 2% or 3% then that is highly economic. So, technology developed slowly, but it continues to evolve and every day, we see better wells than we saw before. So, we're very encouraged that over the course of time, frac technology will continue to improve recoveries. We don't -- we look at Tier 2 to Tier 1, but what we really look at is the economics. Sometimes, if you take a look at, what would be considered a Tier 4 area, for that Tier 4 is considered just on an, EUR basis. While the drilling cost in that area by that operator is lower than some of the stuff in the Tier 2 or Tier 1 locations. And therefore, that economics are actually better. So you got -- you have to differentiate between Tier 1 and Tier 2 economics and Tier 4 or Tier 5 economics. So we do this all the time. The field is constantly changing. And we think for the better. So, Donovan, I'm sorry about the long answer, but that's really core to what we do.