Well, I've had quite a few bad ones, that I managed to tolerate and act like I wanted their business, but those three were so bad, they almost made me want to quit. They were the only ones, I literally told to go elsewhere.

By the way, I disagree with #7, to a degree. Regardless of what you have taped to the wall, customers will know good service when they get it, and will recognize an incapable bow mechanic, regardless of what the piece of paper on the wall says. I do agree that all bow mechanics should be continually learning to improve their craft. Formal certifications might make a good sales aid, but the real value is in the quality of the service being performed.