It's is John, Tim. I -- it will come; I do not think the next wave will be as big as the one, five years -- three years ago. I think there people will be more tempered on investment. I think the long-term outlook is still good, we still need to generate electricity and natural gas, as you pointed out is the primary source of electricity; renewables are coming online and increasing the percentage every year, but I still think there is huge role for natural gas in that mix for electricity, and honestly, that plays into our strong suite because that's typically the higher horsepower fracturing rigs and that tends to -- our 8,500 transmission fits in perfectly there. So, long-term optimistic that we still have a very strong market. I think everyone who is in the market, ourselves included, would like it to be more balanced and steady state then binary, if either being all on or all off; so that's our hope. We would take years of lower demand per year over more years than all or nothing in a year and a half of two years, and then the cycle turn off again. But we're optimistic, yes, there will be some new rig construction; we're also some retrofit and rebuild activity. Again, I think we would have seen more of that in calendar 2020 if it were not for the pandemic; that put a lot of capital spending plans on hold as demand plummeted and the price of oil plummeted. So we see a reversal of that trend, and I think a lot of it has to do -- it will be completely -- not completely, but very much tied to the general economy improving post-COVID, post-vaccine. And if I had to guess, if I had a crystal ball; once we get to a widespread activity where people feel comfortable, are moving in and around the economy and traveling again, you'd see noticeable increase in rebuild, retrofit, new construction a quarter or two after that; it would be my best guess. So we have something -- late spring summer where it's -- a more normal economy is moving, people are moving around and there is a better demand for oil. I think it would be -- within a quarter or so, you'd see -- you would notice that across the board on some equipment manufacturers. QQ Not to believe in a point here but I think, is there a way to think about maybe oil; the U.S. went through sort of a five, six, seven years cycle work, became this tremendous growth engine of global oil, went from 4.5 million barrel a day to 11 million, 12 million, 13 million; I think it's more peaked out in 2019. And I think with all of the OPEC plus countries having to set their production substantially to support oil last year, is there really going to be a -- are we not on a slow decline in the U.S. production for the next several years as a result of that dynamic changing. That would be kind of the framework that I would be working under, where you wouldn't be looking at a recovery in domestic oil production; some margins just sort of a steady decline because OPEC plus is really the supply control at this point, it's not -- but we're on a completely different path from where we were from 2010 to 2018. It is that not something that I guess starting with your view of the world.