I understand your pain, from both sides. It's not just the workmanship but the consumer too, when I get a car there is a lot to do plus there are variables from vehicle to vehicle on how long the servicing is going to take. Sure on an average I can crank out a service in 20 mins. but then there are some that take a little longer depending on accessibility. I understand your problem but the consumer and the rush to get things done fast has created this. I love it when a customer drops off his/her car and asks if they can leave it and come back, makes me go huh! Of course you can, I guess this Jiffylube mentality of the 15 min oil change has ruined what people think about getting their vehicle serviced means. I don't think you can leave you vehicle and come back for it, there's no way to lure you into buying services you don't need. The longer you give me the better the service you shall receive, push me and rush me and you may not get it all checked the way it should be.