[patrickt]

Lippy, take pics of the work before and after and then post a new thread, with descriptive words that show up easily on a Google search. Even showing how you pull the retainer. I know this sounds like an unusual case, and maybe it is, but for the next guy that is using those components, and they are pretty typical after market parts, an informative thread by you would be worth its weight in gold. And this is not just a "Cobra related problem." When I was looking around, I found similar problems to yours on every niche-car-forum you could imagine. You have to detail it in a new thread though, you can't leave it all buried here.