Okay. Certainly, I appreciate the question. But let me -- let me address the OpEx one more point on that. I forgot to give kudos to Anadarko because there, they've really manage their OpEx well, they have a low OpEx and they are apparently doing a really good job to manage that. So the combination bringing that expertise in to us, for the types of wells that they're operating will be helpful too. But to your question, it's going to take us a little bit of time, because what we have to do, the way we do our business to our subsurface characterization is, we drill appraisal wells and that helps get us some data, so we get some petro-physical and geophysical data from the logs that we run when we drill the well. We take that data and we combine it with our 3D data -- 3D seismic data, combining those two, then we can perform data analytics on it, and with the data analytics now, we can take that even a step further with a paradigm shift, we had a couple of years ago, on how to look at the subsurface differently, with respect to how the frac is going to be perform in the zone as you're trying to pump it. So not to say too much about that, but that's, but we went through that process to get us to where our productivity was a couple of years ago or about a year and a half ago. Now what we've done is, we've been able to incorporate 4D frac designs, which is helping us to more accurately understand what's happening with the frac and then not only what's happening with the frac, but what's happening with the drainage area. And that's all really key to spacing and how you design your wells, where you land your wells and all of that. So our subsurface models are much more sophisticated today than they were about three or four, five years ago, and the kudos on that go to our subsurface teams that have worked it really hard, but also our business unit who watch these wells every day, figure out what's happening with them and collaborate with our subsurface team to really get down to trying to figure out what's happening in the subsurface. We've seen some operators that just do this on a statistical basis deal, but you really can't do that and optimize what you get from these wells and the value of these wells. This -- this takes a lot of science and it takes science that -- it goes beyond what we've ever had to do with conventional reservoirs. So the companies that that only drill conventional reservoirs around the world-they haven't dealt with what we are having to deal with here, from a complexity standpoint. We've conquered that, but it's taken a lot of data to do it. It's taken some patience and time, and it's taken getting it to the point where you know it's working, because now we can, and we're predictive with that we can blind wells that we've drilled in the past and run the model and the model will tell us --will match what we're seeing from the wells that we're producing. That's why we're very confident that this model, what we're using now will not only work in other areas outside the Delaware Basin, but in other basins. That's why we're very comfortable that in the D.J. and in the Powder we're going to see increased productivity there, based on the model that we're using. And we think it takes a lot of science and it takes patience so that's why we've said that some of our synergies we can't get in 2020, some of our synergies are going to come in 2021, because we're not going to spend dollars to do trial and error. We're really going to need to have our model and then that's going to take drilling some appraisal wells, and making sure that we have the 3D to match it, and the data analytics around it, but that's why it's going to take a little time to get all the synergies. But we're very confident that we'll get the synergies. Jeff, do you have anything to add to that?