Yes. So we've seen a really significant cost reduction in the offering for fuel cell electric buses in the European market. And so this consortium, where we're looking at offering a single deck bus, through Wrightbus of €375,000, green hydrogen delivered at €5 to €7 per kilogram, and a service cost of €0.30 cents per kilometer driven. This represents a compelling total cost of ownership that in my mind is, if not at par, probably better than best in class pricing for battery electric buses, of course, with superior performance, though for fuel cell electric buses. And if you contrast the cost of fuel cell electric buses two or three years ago, where maybe the cost of a bus was more in the range of €650,000 and say five years ago, closer to €1 million, the cost reduction this represents is fairly significant. I think what you're going to see is there will be some continued support in the very near term in terms of deployments. This 1,000 fuel cell bus program obviously has some support from the CEF fund and we're very appreciative of that, but we are moving to a model where even at volumes that I would consider relatively small, i.e.1,000, we are able to offer as a consortium leaning forward together on costs, a compelling value proposition to transit operators and transit authorities. So, I think we'll see a much higher penetration as we move to 2023, 2025 and obviously, through 2030. And I think the two options for zero emission buses, and of course a number of European cities are clamoring for zero emission buses. We can see very high adoption of zero emission buses occurring. I personally believe we're going to have very high penetration for fuel cell buses, you know, in the 2025 time frame, I expect it to be circa 25% in key cities.