Has anyone seen a crack and caught it before it spread across the face of the stem? At least many people know to look at the base of the crank arm/corner of the spider on Campagnolo Record cranks, and the micro cracks there form fairly slowly. In Sloar's case and the other instances mentioned above, it seems the crack across the stem happens fairly quickly. I assume it would first appear at the edge of the clamp area, but it would be nice to know for sure where to look for the first signs of failure and how much warning one might expect to have.