I worked at a Firestone dealer when I was in college and management did not care where the marks lined up, just get the customers out the door asap was their mantra. I got barked at on a few occasions cuz I would get caught rotating the tire on the rim to line up the mark to the valve stem, or as my manager called it, "lollygagging"...when my naïve self would try to explain what I was doing, I would get the DGAF corporate motivation and just slap the rest of the tires on the rims...this is why I tell people to go to tire stores when they are not busy, cuz management will not be cracking the whip on techs to just get the cars out the doors. Back at the Firestone, we had a customer with a cherry Formula Firebird and a sweet Bonneville SSE that he would bring in to get serviced, always on Sunday mornings before noon, and he would request that I do the work, probably cuz I'd be the only one not hungover and I tried to do a good job. So choose wisely...