 This happened now and then. They would have an engineer come down and say, hey, you're right. That's not right. Let's figure this out. And they would work with the tech. They would diagnose it and decide what part needed to be replaced. And sometimes, since the manufacturer was footing the bill, they would put on multiple parts, whether they needed them or not, just to figure it out. And once they figured it out, they would take that old part back and then try to figure out what was going on. And that's where service bulletins come involved. But, yeah, I think you just got to get some other cars involved to find out