this kind of stuff just makes my stomach churn. just more evidence of why dealerships have such a bad reputation in general. i guess they had a guy in the detail dept. that had a wagner spray gun at home.
glad you are working towards a reasonable resolution. there are a lot of people on here that are clearly resigned to the fact that the dealer can do whatever they want and get away with it and you have no recourse. you ALWAYS have recourse!
remember, if all else fails, take pictures, videos, recordings of conversations (if they are legal in your state). if everything goes south, post them publicly on facebook, yelp, etc. use the power of social media to your advantage, it is an amazing tool.
i bet that guy who with the botched gt350 used his youtube channel as leverage. notice how the dealer's name was not mentioned, probably because he agreed not to as part of the deal.