I think I'm very close to having my cones adjusted. As a final test, I'm holding the valve stem at 3:00 and letting it go, hoping that, because the valve stem is often the heaviest part of the rim, the wheel will come to rest with the valve stem at the bottom. Instead, what comes to rest at the bottom of the wheel is the Mavic label on the rim which looks to be covering a seam in the rim. Is the seam routinely marked with the manufacturer's label, and is the seam usually heavier than the stem? I'm hoping so, because my hub is probably adjusted pretty well in that case.