Spook,
Thanks for your affirming comments. I would have been even more POed had this occurred on my 960 than the 940, as the 960 has the alloy wheels, and improper torquing can warp the rotors. As the 940 has only steel wheels, I'm sure the damage was minimal. Plus, the remaining two tires are about due for replacement anyway. I did notice, however, little flakes of metal, sort if like a fine metallic dust, around the lug nuts, from the friction between the nut and wheel.
As you state, the lesson in this is that even supposedly reputable shops, as in a major chain of auto centers, can have morons performing the actual work on cars. You'd think that a tire and auto center that makes it's living by removing / installing wheels on an hourly basis would have at least the minimal level of competency to do something so simple and basic.
It just convinces me more than ever that it's wise to do as much of my own basic auto maintenance as possible. I'm sure everybody on this board could tell at least one horror story about MIAs working in the quick change oil shops and such.
To paraphrase a well-known saying in the jewelry business, "If you don't know your car, then you'd better know your mechanic."
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