Marty, I'd be reluctant to return to that indy too. Their shop practices seem iffy at best. With you watching, I'd expect the tech to be more careful about doing things correctly. Blaming you for his mistake is a real lame excuse. An experienced tech would have marked the lines to eliminate the possibility of swapping them. Your story only confirms my belief that "professional" merely means that you get paid for doing something, not that you have expert skill or competence.

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Fred Hoelzle