Nightmares

Yes, sometimes at night I look back on the day at work: did I tighten the flywheel housing bolts before I put the engine back in a motor grader, as yourself did I tighten the wheel bearings on the last set of duals I had off of a 3 axle plow truck, or did I tighten all the rocker arm lock nuts after setting the valves and injectors.
After 30 plus years of doing it for a living I actually don't think I have done much damage to anything. It does though make you unsettled sometimes!