First rule: don't be afraid to get your hands dirty—just dive in and mess around. It probably won't kill you! —If it rattles, tighten it up. —If it's sticky, clean it up. —If it sparks, reattach it. —If it clicks, replace it. Second rule: don't sweat the small stuff. As long as they're running when the customer takes them home, we're A-OK. If the job seems any more complicated than that, just pass it off to the R & D crew and let them worry about it.