I know EXACTLY what you mean. When I was working in a muffler shop, I saw some HIDEOUS work come through. It always left nice, but man....some of it was just hideous. Then I also saw some directioonal mufflers come through the shop installed the wrong way. The people were upset with the sound and performance. We would show them the mistake by another shop, and fix it. Then they were almost ALWAYS happy. The times they weren't was a sound issue, which we would just replace the muffler with another one and then they were happy. ALWAYS had repeat business....but that was back in Washington state. Sigh....Oh well.... So much for those days. I was MUCH poorer then than I am now. LOL Hopefully, Rainbow works for him.