Yes. The mix was primarily due, again, there's two major components in -- actually, I guess, three, we have the technology and project aspect, we have the construction aspect in the US, and then we have the parts and services, which – the parts and services typically, as we've always talked about as higher margins on that business. What -- this year, what's been, I wouldn't say, unique just I think it varies each quarter, but this year, we had a little bit more wrapping up with some construction projects, that drove a little bit more of the revenues and the thermal aspect that typically construction has a little bit lower margin on those projects. But, that's usually followed later on, by more parts and services is, we do follow-on on some of the technologies that we did the installation. And other aspects for, I think the other – the other component this year, which is a little bit unique, we had, some a couple of unique variances in the parts and services, especially from our installed base business. One was earlier in the year that we talked about, and during, “Texas” freezer or impact, where a lot of our installed base was – was actually operating on a full time basis, to provide additional power to supplement. The losses that were being incurred through that sets this issue. What we're seeing, this summer, and we think, it will continue into the fall is that those same installed worldwide our installed base actually is operating way more than our customers had ever planned. Because of the high price of natural gas, and due to that, we do anticipate that the parts and other aspects would catch up significantly and actually grow. So, this year, I think, our parts is in a strong position and its performance, and will contribute, what it normally does. But based on the higher demand of these installed base plants that we provide parts and services for on a global basis, we think that there's good potential that we should see even higher parts and services, which would be higher margins, going into next year. So, we'll see if that unfolds, but we anticipate that, and the early the early indications are that, it's that – it's a pretty good understanding on our part.