Well, I think the way to think about the spares business is there's, I mean, it's big, but it's not unlimited potential for growth in that business because if you think about, there's about 22,000 or 23,000 large commercial aircraft in the world. I'm excluding turboprops and small aircraft. There you've got about, say, 46,000 engines in service. The sparing ratio, depending on the engine type, is, you know, 12% to 15%. So that's your spares portfolio. If you say there's 46,000 in service, take 13%, 14%, that's 5,000 engines in change, maybe 5,500 engines. That's the sparing size. As the world's fleet of aircraft grows, then you will have, as I said, the spares requirement will grow by 12% to 15%. So that's how it works. So there's not an unlimited, it's different to aircraft because I said it's only sparing. When it comes to the economics of the engine business model, slightly different to the aircraft business model because an engine really holds its value over the long term as it's overhauled. And the market value of the engine doesn't tend to depreciate a tremendous amount if you've got the right engine. And on the engines, it's fair to say, because of the slower depreciation of the assets, your value in the engine business is created over time, whereas on the aircraft side, you make a lot of your money on the first lease, to be fair. And then at the back end, you're managing engines. So I would say that there's a timing difference in how the two businesses work.