Yes. Thanks Don. So certainly on the OpEx side, as we've talked many times about a big chunk of the OpEx stack is contractual and/or corporate structure based means that the ownership are midstream, the fund transportation commitments we've made these are long-term sticky cost advantages, that it would take our peers a long time or a lot of money to sort of narrow the gap on. Some of the stuff, that's a little bit more directly controllable that we are paying laser focus to is your OpEx piece, which is a smaller part of overall operating costs. But certainly OpEx contributes to that, it's about 10% of that stack. And we're always looking at ways of maintaining by – optimizing how much maintenance we're doing, optimizing how much expense we're – how much money we're spending, what we're doing with crews, how we’re deploying our workforce, trying to squeeze every bit of optimization we can out of maintaining our asset base. Similarly, on the D&C side, look, one of the – not only just our sort of maintenance and production, the seven-year plan that we've put out there provide you guys a lot of guidance in a long-term view, it also provides our operating teams a long-term view, and that allows them to plan ahead, negotiate, smart contracts, smart logistics, making sure that supplies will be in place, service providers know what's coming, that we see what challenges are coming down the road, whether it's longer laterals or different drilling locations like making they see that coming down the road, they know where they're going, they know what to expect, and they can plan accordingly, that has allowed us to execute at an extremely high level, they continue to improve the leading edge cutting edge of D&C efficiency. And, look, we've got a team downstairs, incredibly intelligent people, incredibly technical operators, giving them that long line of sight on what to expect, giving them clear goalposts for what we’re solving for, free cash flow per share has allowed them to just focus on executing and getting the job done.