I'm not trying to be a dick or anything, but are you sure you didn't burn up the rings when you were revving the piss out of it? I don't know your situation at all and this shop sounds shady, but just make you aren't giving a shop hell (and a bad rep) for your boo boo. Sounds like you got dicked, but I sure hope you're right. Otherwise you're gonna have a lotta apologizing to do. With that said, good luck! I hope you don't get the short end of the stick on this. If you do, you're in the right spot. Not paying for labor can save you a lot of $$$, and there are plenty of people that are willing to help you out if you buy the parts (myself included).