I called and talked directly to Tony a few weeks back about his 10 mil cranks. What it boiled down to was this: If i wanted a really GOOD 10mil,,go with his $800 10 mil. He personally puts those together and checks everything himself. The components are of higher quality too. The $400 one,,,,well, he said IF,,IF i would not abuse it ( aka over-rev ,etc) it should be fine ,as most crank failures are rider induced. Like it or not,that seems to be the case. For my peace of mind,I'll stick with his $800 crank and KNOW who put it together.