That's as good a check as any Vic, the Human Finger can detect microscopic defects. The problem is the Light Alloy spacer between the Bearings. It's fairly long compared to most others, and it will compress slightly when the Axle is tightened. The correct torque is specified so that the bearings are loaded 'just right'. If a Shaved Ape (© Pete Roper) just does it up with a 3ft Bar, the Spacer compresses enough for the Bearings to be overloaded, and they won't last long.