It is a couple of things, so I'm looking at coverage from 30,000 feet, what that represent, you could you basket of the wells that we elected to participate and you get a basket on basically the weighted average of the well in process, call it our docks, and we continue to see them come down, you’ve got higher incentive completions and bigger wells in some of the bigger longer lateral units that we’re drilling with Continental in the core of the play, we just elected the 17 gross wells in a unit with Continental in there, it’s 2560 unit, every wells is going to be high intensity completions, so you're going to have a basket of that which is really ideal just the way they’ve been completing the wells, proceeding wells that are in 6.3 range and lower. So it’s really just a mix of more efficient drilling and completion and then higher intensity completion across the board, it's all kind of working in our favor because you're seeing the uplift from the EURs was and then generally, the AFEs have trended down. It's the completion costs, what are the best data points that we've seen over the last couple of weeks is our operating partners are starting to reference during this earnings season, what completion costs look like and that's the biggest mover as far as total D&C costs coming down is completion costs. So very encouraging across-the-board, our operating partners, if you think about who they are, the Continentals, Whitings, Slawsons, EOGs, others and it is, I mean in real time, they are working really hard to make this efficient and it also helps that we’re constantly coming down, and we’re drilling in the core of the play, and we've got substantial inventory in the core of the play. So we’re seeing the benefits of all of these efficiencies.