Yeah, 102 years seems crazy, that's why these MTBF calculations are kind of weird, and have to be taken in relative terms. If the number came out really low, we'd be concerned. Some methods have generally lower numbers (10s of thousand of hours), others are more like 100s of thousands of hours. Our customers who ask generally have the relative reference points to compare to. As for 10 years mining, as I said, actual mileage will vary.