I've got to remember that line "Sounds like you're not ready to have your car looked like, my name is XYZ, I'm here when you're ready". Not defensive, very professional. I just had a phone call like this earlier this week. He wanted to tell me his diagnostic of the problem, but his repair choice had nothing to do with the problem. I had to gently let him know that, which set him off just a little, defensively. He said he'd call me back, which I doubted. He did two days later. I think he got my same answer from other shops. That's prob. my least favorite conversation, when a prideful customer (man or woman) think they've got it figured out and their mind is made up. My response to that is "I can do what you ask, but if it's not the answer and the problem is still happening, there is still the charge of the repair. This is why I am recommending the inspection before the repair."