Might I propose, if things were working properly prior to the maintenance, and no longer are after...maybe we don't need to perform such maintenance in the future? If my car stopped running after a tune-up, I think I might avoid taking it to the repair shop (at least that particular repair shop) until it actually had problems next time... I understand the whole ounce of prevention thing, but when that ounce of prevention turns out to be worth a pound of plague, perhaps the prevention should be prevented.